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 "../util.h"
 
 
 
 
 
 
 
 
 
 
 
 31#include "../event.h"
 32#include "../thread.h"
 
 
 
 
 33#include "../trace-event.h"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 34
 35PyMODINIT_FUNC initperf_trace_context(void);
 
 
 
 
 
 
 
 
 
 
 
 
 
 36
 37#define FTRACE_MAX_EVENT				\
 38	((1 << (sizeof(unsigned short) * 8)) - 1)
 39
 40struct event_format *events[FTRACE_MAX_EVENT];
 
 
 41
 42#define MAX_FIELDS	64
 43#define N_COMMON_FIELDS	7
 44
 45extern struct scripting_context *scripting_context;
 46
 47static char *cur_field_name;
 48static int zero_flag_atom;
 
 
 
 
 
 49
 50static PyObject *main_module, *main_dict;
 51
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 52static void handler_call_die(const char *handler_name)
 53{
 54	PyErr_Print();
 55	Py_FatalError("problem in Python trace event handler");
 
 
 
 56}
 57
 58static void define_value(enum print_arg_type field_type,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 59			 const char *ev_name,
 60			 const char *field_name,
 61			 const char *field_value,
 62			 const char *field_str)
 63{
 64	const char *handler_name = "define_flag_value";
 65	PyObject *handler, *t, *retval;
 66	unsigned long long value;
 67	unsigned n = 0;
 68
 69	if (field_type == PRINT_SYMBOL)
 70		handler_name = "define_symbolic_value";
 71
 72	t = PyTuple_New(4);
 73	if (!t)
 74		Py_FatalError("couldn't create Python tuple");
 75
 76	value = eval_flag(field_value);
 77
 78	PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 79	PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 80	PyTuple_SetItem(t, n++, PyInt_FromLong(value));
 81	PyTuple_SetItem(t, n++, PyString_FromString(field_str));
 82
 83	handler = PyDict_GetItemString(main_dict, handler_name);
 84	if (handler && PyCallable_Check(handler)) {
 85		retval = PyObject_CallObject(handler, t);
 86		if (retval == NULL)
 87			handler_call_die(handler_name);
 88	}
 89
 90	Py_DECREF(t);
 91}
 92
 93static void define_values(enum print_arg_type field_type,
 94			  struct print_flag_sym *field,
 95			  const char *ev_name,
 96			  const char *field_name)
 97{
 98	define_value(field_type, ev_name, field_name, field->value,
 99		     field->str);
100
101	if (field->next)
102		define_values(field_type, field->next, ev_name, field_name);
103}
104
105static void define_field(enum print_arg_type field_type,
106			 const char *ev_name,
107			 const char *field_name,
108			 const char *delim)
109{
110	const char *handler_name = "define_flag_field";
111	PyObject *handler, *t, *retval;
112	unsigned n = 0;
113
114	if (field_type == PRINT_SYMBOL)
115		handler_name = "define_symbolic_field";
116
117	if (field_type == PRINT_FLAGS)
118		t = PyTuple_New(3);
119	else
120		t = PyTuple_New(2);
121	if (!t)
122		Py_FatalError("couldn't create Python tuple");
123
124	PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
125	PyTuple_SetItem(t, n++, PyString_FromString(field_name));
126	if (field_type == PRINT_FLAGS)
127		PyTuple_SetItem(t, n++, PyString_FromString(delim));
128
129	handler = PyDict_GetItemString(main_dict, handler_name);
130	if (handler && PyCallable_Check(handler)) {
131		retval = PyObject_CallObject(handler, t);
132		if (retval == NULL)
133			handler_call_die(handler_name);
134	}
135
136	Py_DECREF(t);
137}
138
139static void define_event_symbols(struct event_format *event,
140				 const char *ev_name,
141				 struct print_arg *args)
142{
 
 
 
143	switch (args->type) {
144	case PRINT_NULL:
145		break;
146	case PRINT_ATOM:
147		define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
148			     args->atom.atom);
149		zero_flag_atom = 0;
150		break;
151	case PRINT_FIELD:
152		if (cur_field_name)
153			free(cur_field_name);
154		cur_field_name = strdup(args->field.name);
155		break;
156	case PRINT_FLAGS:
157		define_event_symbols(event, ev_name, args->flags.field);
158		define_field(PRINT_FLAGS, ev_name, cur_field_name,
159			     args->flags.delim);
160		define_values(PRINT_FLAGS, args->flags.flags, ev_name,
161			      cur_field_name);
162		break;
163	case PRINT_SYMBOL:
164		define_event_symbols(event, ev_name, args->symbol.field);
165		define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
166		define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
167			      cur_field_name);
168		break;
169	case PRINT_STRING:
 
 
 
 
 
 
 
 
 
 
170		break;
171	case PRINT_TYPE:
172		define_event_symbols(event, ev_name, args->typecast.item);
173		break;
174	case PRINT_OP:
175		if (strcmp(args->op.op, ":") == 0)
176			zero_flag_atom = 1;
177		define_event_symbols(event, ev_name, args->op.left);
178		define_event_symbols(event, ev_name, args->op.right);
179		break;
180	default:
181		/* gcc warns for these? */
182	case PRINT_BSTRING:
183	case PRINT_DYNAMIC_ARRAY:
184	case PRINT_FUNC:
 
 
185		/* we should warn... */
186		return;
187	}
188
189	if (args->next)
190		define_event_symbols(event, ev_name, args->next);
191}
192
193static inline struct event_format *find_cache_event(int type)
 
194{
195	static char ev_name[256];
196	struct event_format *event;
 
 
197
198	if (events[type])
199		return events[type];
 
 
 
 
 
 
 
 
200
201	events[type] = event = trace_find_event(type);
202	if (!event)
203		return NULL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
204
205	sprintf(ev_name, "%s__%s", event->system, event->name);
 
 
 
206
207	define_event_symbols(event, ev_name, event->print_fmt.args);
 
 
 
 
 
208
209	return event;
210}
211
212static void python_process_event(union perf_event *pevent __unused,
213				 struct perf_sample *sample,
214				 struct perf_evsel *evsel __unused,
215				 struct machine *machine __unused,
216				 struct thread *thread)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
217{
218	PyObject *handler, *retval, *context, *t, *obj, *dict = NULL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
219	static char handler_name[256];
220	struct format_field *field;
221	unsigned long long val;
222	unsigned long s, ns;
223	struct event_format *event;
224	unsigned n = 0;
225	int type;
226	int pid;
227	int cpu = sample->cpu;
228	void *data = sample->raw_data;
229	unsigned long long nsecs = sample->time;
230	char *comm = thread->comm;
231
232	t = PyTuple_New(MAX_FIELDS);
233	if (!t)
234		Py_FatalError("couldn't create Python tuple");
235
236	type = trace_parse_common_type(data);
237
238	event = find_cache_event(type);
239	if (!event)
240		die("ug! no event found for type %d", type);
241
242	pid = trace_parse_common_pid(data);
243
244	sprintf(handler_name, "%s__%s", event->system, event->name);
245
246	handler = PyDict_GetItemString(main_dict, handler_name);
247	if (handler && !PyCallable_Check(handler))
248		handler = NULL;
 
249	if (!handler) {
 
 
 
250		dict = PyDict_New();
251		if (!dict)
252			Py_FatalError("couldn't create Python dict");
253	}
254	s = nsecs / NSECS_PER_SEC;
255	ns = nsecs - s * NSECS_PER_SEC;
256
257	scripting_context->event_data = data;
 
 
 
258
259	context = PyCObject_FromVoidPtr(scripting_context, NULL);
 
260
261	PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
 
 
262	PyTuple_SetItem(t, n++, context);
263
264	if (handler) {
265		PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
266		PyTuple_SetItem(t, n++, PyInt_FromLong(s));
267		PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
268		PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
269		PyTuple_SetItem(t, n++, PyString_FromString(comm));
 
 
 
 
 
 
270	} else {
271		PyDict_SetItemString(dict, "common_cpu", PyInt_FromLong(cpu));
272		PyDict_SetItemString(dict, "common_s", PyInt_FromLong(s));
273		PyDict_SetItemString(dict, "common_ns", PyInt_FromLong(ns));
274		PyDict_SetItemString(dict, "common_pid", PyInt_FromLong(pid));
275		PyDict_SetItemString(dict, "common_comm", PyString_FromString(comm));
 
276	}
277	for (field = event->format.fields; field; field = field->next) {
278		if (field->flags & FIELD_IS_STRING) {
279			int offset;
280			if (field->flags & FIELD_IS_DYNAMIC) {
281				offset = *(int *)(data + field->offset);
 
 
 
 
 
 
 
282				offset &= 0xffff;
283			} else
284				offset = field->offset;
285			obj = PyString_FromString((char *)data + offset);
286		} else { /* FIELD_IS_NUMERIC */
287			val = read_size(data + field->offset, field->size);
288			if (field->flags & FIELD_IS_SIGNED) {
289				if ((long long)val >= LONG_MIN &&
290				    (long long)val <= LONG_MAX)
291					obj = PyInt_FromLong(val);
292				else
293					obj = PyLong_FromLongLong(val);
294			} else {
295				if (val <= LONG_MAX)
296					obj = PyInt_FromLong(val);
297				else
298					obj = PyLong_FromUnsignedLongLong(val);
299			}
 
 
300		}
301		if (handler)
302			PyTuple_SetItem(t, n++, obj);
303		else
304			PyDict_SetItemString(dict, field->name, obj);
305
306	}
307	if (!handler)
 
308		PyTuple_SetItem(t, n++, dict);
309
 
 
 
 
 
 
 
 
310	if (_PyTuple_Resize(&t, n) == -1)
311		Py_FatalError("error resizing Python tuple");
312
313	if (handler) {
314		retval = PyObject_CallObject(handler, t);
315		if (retval == NULL)
316			handler_call_die(handler_name);
317	} else {
318		handler = PyDict_GetItemString(main_dict, "trace_unhandled");
319		if (handler && PyCallable_Check(handler)) {
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
320
321			retval = PyObject_CallObject(handler, t);
322			if (retval == NULL)
323				handler_call_die("trace_unhandled");
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
324		}
325		Py_DECREF(dict);
326	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
327
328	Py_DECREF(t);
329}
330
331static int run_start_sub(void)
332{
333	PyObject *handler, *retval;
334	int err = 0;
 
 
335
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
336	main_module = PyImport_AddModule("__main__");
337	if (main_module == NULL)
338		return -1;
339	Py_INCREF(main_module);
340
341	main_dict = PyModule_GetDict(main_module);
342	if (main_dict == NULL) {
343		err = -1;
344		goto error;
345	}
346	Py_INCREF(main_dict);
347
348	handler = PyDict_GetItemString(main_dict, "trace_begin");
349	if (handler == NULL || !PyCallable_Check(handler))
350		goto out;
351
352	retval = PyObject_CallObject(handler, NULL);
353	if (retval == NULL)
354		handler_call_die("trace_begin");
355
356	Py_DECREF(retval);
357	return err;
358error:
359	Py_XDECREF(main_dict);
360	Py_XDECREF(main_module);
361out:
362	return err;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
363}
 
 
 
 
 
 
 
 
 
 
364
365/*
366 * Start trace script
367 */
368static int python_start_script(const char *script, int argc, const char **argv)
 
369{
 
 
370	const char **command_line;
371	char buf[PATH_MAX];
 
 
 
 
 
 
 
372	int i, err = 0;
373	FILE *fp;
374
 
 
375	command_line = malloc((argc + 1) * sizeof(const char *));
 
 
 
376	command_line[0] = script;
377	for (i = 1; i < argc + 1; i++)
378		command_line[i] = argv[i - 1];
 
 
 
 
 
379
 
 
 
 
 
380	Py_Initialize();
381
382	initperf_trace_context();
383
384	PySys_SetArgv(argc + 1, (char **)command_line);
 
 
 
385
386	fp = fopen(script, "r");
387	if (!fp) {
388		sprintf(buf, "Can't open python script \"%s\"", script);
389		perror(buf);
390		err = -1;
391		goto error;
392	}
393
394	err = PyRun_SimpleFile(fp, script);
395	if (err) {
396		fprintf(stderr, "Error running python script %s\n", script);
397		goto error;
398	}
399
400	err = run_start_sub();
401	if (err) {
402		fprintf(stderr, "Error starting python script %s\n", script);
403		goto error;
404	}
405
406	free(command_line);
 
 
 
 
 
 
 
 
407
408	return err;
409error:
410	Py_Finalize();
411	free(command_line);
412
413	return err;
414}
415
 
 
 
 
 
416/*
417 * Stop trace script
418 */
419static int python_stop_script(void)
420{
421	PyObject *handler, *retval;
422	int err = 0;
423
424	handler = PyDict_GetItemString(main_dict, "trace_end");
425	if (handler == NULL || !PyCallable_Check(handler))
426		goto out;
427
428	retval = PyObject_CallObject(handler, NULL);
429	if (retval == NULL)
430		handler_call_die("trace_end");
431	else
432		Py_DECREF(retval);
433out:
434	Py_XDECREF(main_dict);
435	Py_XDECREF(main_module);
436	Py_Finalize();
437
438	return err;
439}
440
441static int python_generate_script(const char *outfile)
 
442{
443	struct event_format *event = NULL;
444	struct format_field *f;
 
 
445	char fname[PATH_MAX];
446	int not_first, count;
447	FILE *ofp;
448
449	sprintf(fname, "%s.py", outfile);
450	ofp = fopen(fname, "w");
451	if (ofp == NULL) {
452		fprintf(stderr, "couldn't open %s\n", fname);
453		return -1;
454	}
455	fprintf(ofp, "# perf script event handlers, "
456		"generated by perf script -g python\n");
457
458	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
459		" License version 2\n\n");
460
461	fprintf(ofp, "# The common_* event handler fields are the most useful "
462		"fields common to\n");
463
464	fprintf(ofp, "# all events.  They don't necessarily correspond to "
465		"the 'common_*' fields\n");
466
467	fprintf(ofp, "# in the format files.  Those fields not available as "
468		"handler params can\n");
469
470	fprintf(ofp, "# be retrieved using Python functions of the form "
471		"common_*(context).\n");
472
473	fprintf(ofp, "# See the perf-trace-python Documentation for the list "
474		"of available functions.\n\n");
475
 
476	fprintf(ofp, "import os\n");
477	fprintf(ofp, "import sys\n\n");
478
479	fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
480	fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
481	fprintf(ofp, "\nfrom perf_trace_context import *\n");
482	fprintf(ofp, "from Core import *\n\n\n");
483
484	fprintf(ofp, "def trace_begin():\n");
485	fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
486
487	fprintf(ofp, "def trace_end():\n");
488	fprintf(ofp, "\tprint \"in trace_end\"\n\n");
 
 
 
489
490	while ((event = trace_find_next_event(event))) {
 
491		fprintf(ofp, "def %s__%s(", event->system, event->name);
492		fprintf(ofp, "event_name, ");
493		fprintf(ofp, "context, ");
494		fprintf(ofp, "common_cpu,\n");
495		fprintf(ofp, "\tcommon_secs, ");
496		fprintf(ofp, "common_nsecs, ");
497		fprintf(ofp, "common_pid, ");
498		fprintf(ofp, "common_comm,\n\t");
 
499
500		not_first = 0;
501		count = 0;
502
503		for (f = event->format.fields; f; f = f->next) {
504			if (not_first++)
505				fprintf(ofp, ", ");
506			if (++count % 5 == 0)
507				fprintf(ofp, "\n\t");
508
509			fprintf(ofp, "%s", f->name);
510		}
 
 
 
 
 
 
511		fprintf(ofp, "):\n");
512
513		fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
514			"common_secs, common_nsecs,\n\t\t\t"
515			"common_pid, common_comm)\n\n");
516
517		fprintf(ofp, "\t\tprint \"");
518
519		not_first = 0;
520		count = 0;
521
522		for (f = event->format.fields; f; f = f->next) {
523			if (not_first++)
524				fprintf(ofp, ", ");
525			if (count && count % 3 == 0) {
526				fprintf(ofp, "\" \\\n\t\t\"");
527			}
528			count++;
529
530			fprintf(ofp, "%s=", f->name);
531			if (f->flags & FIELD_IS_STRING ||
532			    f->flags & FIELD_IS_FLAG ||
533			    f->flags & FIELD_IS_SYMBOLIC)
 
534				fprintf(ofp, "%%s");
535			else if (f->flags & FIELD_IS_SIGNED)
536				fprintf(ofp, "%%d");
537			else
538				fprintf(ofp, "%%u");
539		}
540
541		fprintf(ofp, "\\n\" %% \\\n\t\t(");
542
543		not_first = 0;
544		count = 0;
545
546		for (f = event->format.fields; f; f = f->next) {
547			if (not_first++)
548				fprintf(ofp, ", ");
549
550			if (++count % 5 == 0)
551				fprintf(ofp, "\n\t\t");
552
553			if (f->flags & FIELD_IS_FLAG) {
554				if ((count - 1) % 5 != 0) {
555					fprintf(ofp, "\n\t\t");
556					count = 4;
557				}
558				fprintf(ofp, "flag_str(\"");
559				fprintf(ofp, "%s__%s\", ", event->system,
560					event->name);
561				fprintf(ofp, "\"%s\", %s)", f->name,
562					f->name);
563			} else if (f->flags & FIELD_IS_SYMBOLIC) {
564				if ((count - 1) % 5 != 0) {
565					fprintf(ofp, "\n\t\t");
566					count = 4;
567				}
568				fprintf(ofp, "symbol_str(\"");
569				fprintf(ofp, "%s__%s\", ", event->system,
570					event->name);
571				fprintf(ofp, "\"%s\", %s)", f->name,
572					f->name);
573			} else
574				fprintf(ofp, "%s", f->name);
575		}
576
577		fprintf(ofp, "),\n\n");
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
578	}
579
580	fprintf(ofp, "def trace_unhandled(event_name, context, "
581		"event_fields_dict):\n");
582
583	fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))"
584		"for k,v in sorted(event_fields_dict.items())])\n\n");
 
585
586	fprintf(ofp, "def print_header("
587		"event_name, cpu, secs, nsecs, pid, comm):\n"
588		"\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
589		"(event_name, cpu, secs, nsecs, pid, comm),\n");
 
 
 
 
590
591	fclose(ofp);
592
593	fprintf(stderr, "generated Python script: %s\n", fname);
594
595	return 0;
596}
 
 
 
 
 
 
 
 
 
 
 
 
597
598struct scripting_ops python_scripting_ops = {
599	.name = "Python",
600	.start_script = python_start_script,
601	.stop_script = python_stop_script,
602	.process_event = python_process_event,
603	.generate_script = python_generate_script,
 
 
 
 
 
 
 
604};