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 <inttypes.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <stdbool.h>
29 #include <errno.h>
30 #include <linux/bitmap.h>
31 #include <linux/compiler.h>
32 #include <linux/time64.h>
33 
34 #include "../build-id.h"
35 #include "../counts.h"
36 #include "../debug.h"
37 #include "../dso.h"
38 #include "../callchain.h"
39 #include "../evsel.h"
40 #include "../event.h"
41 #include "../thread.h"
42 #include "../comm.h"
43 #include "../machine.h"
44 #include "../db-export.h"
45 #include "../thread-stack.h"
46 #include "../trace-event.h"
47 #include "../call-path.h"
48 #include "map.h"
49 #include "symbol.h"
50 #include "thread_map.h"
51 #include "print_binary.h"
52 #include "stat.h"
53 #include "mem-events.h"
54 
55 #if PY_MAJOR_VERSION < 3
56 #define _PyUnicode_FromString(arg) \
57   PyString_FromString(arg)
58 #define _PyUnicode_FromStringAndSize(arg1, arg2) \
59   PyString_FromStringAndSize((arg1), (arg2))
60 #define _PyBytes_FromStringAndSize(arg1, arg2) \
61   PyString_FromStringAndSize((arg1), (arg2))
62 #define _PyLong_FromLong(arg) \
63   PyInt_FromLong(arg)
64 #define _PyLong_AsLong(arg) \
65   PyInt_AsLong(arg)
66 #define _PyCapsule_New(arg1, arg2, arg3) \
67   PyCObject_FromVoidPtr((arg1), (arg2))
68 
69 PyMODINIT_FUNC initperf_trace_context(void);
70 #else
71 #define _PyUnicode_FromString(arg) \
72   PyUnicode_FromString(arg)
73 #define _PyUnicode_FromStringAndSize(arg1, arg2) \
74   PyUnicode_FromStringAndSize((arg1), (arg2))
75 #define _PyBytes_FromStringAndSize(arg1, arg2) \
76   PyBytes_FromStringAndSize((arg1), (arg2))
77 #define _PyLong_FromLong(arg) \
78   PyLong_FromLong(arg)
79 #define _PyLong_AsLong(arg) \
80   PyLong_AsLong(arg)
81 #define _PyCapsule_New(arg1, arg2, arg3) \
82   PyCapsule_New((arg1), (arg2), (arg3))
83 
84 PyMODINIT_FUNC PyInit_perf_trace_context(void);
85 #endif
86 
87 #define TRACE_EVENT_TYPE_MAX				\
88 	((1 << (sizeof(unsigned short) * 8)) - 1)
89 
90 static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
91 
92 #define MAX_FIELDS	64
93 #define N_COMMON_FIELDS	7
94 
95 extern struct scripting_context *scripting_context;
96 
97 static char *cur_field_name;
98 static int zero_flag_atom;
99 
100 static PyObject *main_module, *main_dict;
101 
102 struct tables {
103 	struct db_export	dbe;
104 	PyObject		*evsel_handler;
105 	PyObject		*machine_handler;
106 	PyObject		*thread_handler;
107 	PyObject		*comm_handler;
108 	PyObject		*comm_thread_handler;
109 	PyObject		*dso_handler;
110 	PyObject		*symbol_handler;
111 	PyObject		*branch_type_handler;
112 	PyObject		*sample_handler;
113 	PyObject		*call_path_handler;
114 	PyObject		*call_return_handler;
115 	PyObject		*synth_handler;
116 	PyObject		*context_switch_handler;
117 	bool			db_export_mode;
118 };
119 
120 static struct tables tables_global;
121 
122 static void handler_call_die(const char *handler_name) __noreturn;
123 static void handler_call_die(const char *handler_name)
124 {
125 	PyErr_Print();
126 	Py_FatalError("problem in Python trace event handler");
127 	// Py_FatalError does not return
128 	// but we have to make the compiler happy
129 	abort();
130 }
131 
132 /*
133  * Insert val into into the dictionary and decrement the reference counter.
134  * This is necessary for dictionaries since PyDict_SetItemString() does not
135  * steal a reference, as opposed to PyTuple_SetItem().
136  */
137 static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
138 {
139 	PyDict_SetItemString(dict, key, val);
140 	Py_DECREF(val);
141 }
142 
143 static PyObject *get_handler(const char *handler_name)
144 {
145 	PyObject *handler;
146 
147 	handler = PyDict_GetItemString(main_dict, handler_name);
148 	if (handler && !PyCallable_Check(handler))
149 		return NULL;
150 	return handler;
151 }
152 
153 static int get_argument_count(PyObject *handler)
154 {
155 	int arg_count = 0;
156 
157 	/*
158 	 * The attribute for the code object is func_code in Python 2,
159 	 * whereas it is __code__ in Python 3.0+.
160 	 */
161 	PyObject *code_obj = PyObject_GetAttrString(handler,
162 		"func_code");
163 	if (PyErr_Occurred()) {
164 		PyErr_Clear();
165 		code_obj = PyObject_GetAttrString(handler,
166 			"__code__");
167 	}
168 	PyErr_Clear();
169 	if (code_obj) {
170 		PyObject *arg_count_obj = PyObject_GetAttrString(code_obj,
171 			"co_argcount");
172 		if (arg_count_obj) {
173 			arg_count = (int) _PyLong_AsLong(arg_count_obj);
174 			Py_DECREF(arg_count_obj);
175 		}
176 		Py_DECREF(code_obj);
177 	}
178 	return arg_count;
179 }
180 
181 static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
182 {
183 	PyObject *retval;
184 
185 	retval = PyObject_CallObject(handler, args);
186 	if (retval == NULL)
187 		handler_call_die(die_msg);
188 	Py_DECREF(retval);
189 }
190 
191 static void try_call_object(const char *handler_name, PyObject *args)
192 {
193 	PyObject *handler;
194 
195 	handler = get_handler(handler_name);
196 	if (handler)
197 		call_object(handler, args, handler_name);
198 }
199 
200 static void define_value(enum tep_print_arg_type field_type,
201 			 const char *ev_name,
202 			 const char *field_name,
203 			 const char *field_value,
204 			 const char *field_str)
205 {
206 	const char *handler_name = "define_flag_value";
207 	PyObject *t;
208 	unsigned long long value;
209 	unsigned n = 0;
210 
211 	if (field_type == TEP_PRINT_SYMBOL)
212 		handler_name = "define_symbolic_value";
213 
214 	t = PyTuple_New(4);
215 	if (!t)
216 		Py_FatalError("couldn't create Python tuple");
217 
218 	value = eval_flag(field_value);
219 
220 	PyTuple_SetItem(t, n++, _PyUnicode_FromString(ev_name));
221 	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_name));
222 	PyTuple_SetItem(t, n++, _PyLong_FromLong(value));
223 	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_str));
224 
225 	try_call_object(handler_name, t);
226 
227 	Py_DECREF(t);
228 }
229 
230 static void define_values(enum tep_print_arg_type field_type,
231 			  struct tep_print_flag_sym *field,
232 			  const char *ev_name,
233 			  const char *field_name)
234 {
235 	define_value(field_type, ev_name, field_name, field->value,
236 		     field->str);
237 
238 	if (field->next)
239 		define_values(field_type, field->next, ev_name, field_name);
240 }
241 
242 static void define_field(enum tep_print_arg_type field_type,
243 			 const char *ev_name,
244 			 const char *field_name,
245 			 const char *delim)
246 {
247 	const char *handler_name = "define_flag_field";
248 	PyObject *t;
249 	unsigned n = 0;
250 
251 	if (field_type == TEP_PRINT_SYMBOL)
252 		handler_name = "define_symbolic_field";
253 
254 	if (field_type == TEP_PRINT_FLAGS)
255 		t = PyTuple_New(3);
256 	else
257 		t = PyTuple_New(2);
258 	if (!t)
259 		Py_FatalError("couldn't create Python tuple");
260 
261 	PyTuple_SetItem(t, n++, _PyUnicode_FromString(ev_name));
262 	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_name));
263 	if (field_type == TEP_PRINT_FLAGS)
264 		PyTuple_SetItem(t, n++, _PyUnicode_FromString(delim));
265 
266 	try_call_object(handler_name, t);
267 
268 	Py_DECREF(t);
269 }
270 
271 static void define_event_symbols(struct tep_event *event,
272 				 const char *ev_name,
273 				 struct tep_print_arg *args)
274 {
275 	if (args == NULL)
276 		return;
277 
278 	switch (args->type) {
279 	case TEP_PRINT_NULL:
280 		break;
281 	case TEP_PRINT_ATOM:
282 		define_value(TEP_PRINT_FLAGS, ev_name, cur_field_name, "0",
283 			     args->atom.atom);
284 		zero_flag_atom = 0;
285 		break;
286 	case TEP_PRINT_FIELD:
287 		free(cur_field_name);
288 		cur_field_name = strdup(args->field.name);
289 		break;
290 	case TEP_PRINT_FLAGS:
291 		define_event_symbols(event, ev_name, args->flags.field);
292 		define_field(TEP_PRINT_FLAGS, ev_name, cur_field_name,
293 			     args->flags.delim);
294 		define_values(TEP_PRINT_FLAGS, args->flags.flags, ev_name,
295 			      cur_field_name);
296 		break;
297 	case TEP_PRINT_SYMBOL:
298 		define_event_symbols(event, ev_name, args->symbol.field);
299 		define_field(TEP_PRINT_SYMBOL, ev_name, cur_field_name, NULL);
300 		define_values(TEP_PRINT_SYMBOL, args->symbol.symbols, ev_name,
301 			      cur_field_name);
302 		break;
303 	case TEP_PRINT_HEX:
304 	case TEP_PRINT_HEX_STR:
305 		define_event_symbols(event, ev_name, args->hex.field);
306 		define_event_symbols(event, ev_name, args->hex.size);
307 		break;
308 	case TEP_PRINT_INT_ARRAY:
309 		define_event_symbols(event, ev_name, args->int_array.field);
310 		define_event_symbols(event, ev_name, args->int_array.count);
311 		define_event_symbols(event, ev_name, args->int_array.el_size);
312 		break;
313 	case TEP_PRINT_STRING:
314 		break;
315 	case TEP_PRINT_TYPE:
316 		define_event_symbols(event, ev_name, args->typecast.item);
317 		break;
318 	case TEP_PRINT_OP:
319 		if (strcmp(args->op.op, ":") == 0)
320 			zero_flag_atom = 1;
321 		define_event_symbols(event, ev_name, args->op.left);
322 		define_event_symbols(event, ev_name, args->op.right);
323 		break;
324 	default:
325 		/* gcc warns for these? */
326 	case TEP_PRINT_BSTRING:
327 	case TEP_PRINT_DYNAMIC_ARRAY:
328 	case TEP_PRINT_DYNAMIC_ARRAY_LEN:
329 	case TEP_PRINT_FUNC:
330 	case TEP_PRINT_BITMASK:
331 		/* we should warn... */
332 		return;
333 	}
334 
335 	if (args->next)
336 		define_event_symbols(event, ev_name, args->next);
337 }
338 
339 static PyObject *get_field_numeric_entry(struct tep_event *event,
340 		struct tep_format_field *field, void *data)
341 {
342 	bool is_array = field->flags & TEP_FIELD_IS_ARRAY;
343 	PyObject *obj = NULL, *list = NULL;
344 	unsigned long long val;
345 	unsigned int item_size, n_items, i;
346 
347 	if (is_array) {
348 		list = PyList_New(field->arraylen);
349 		item_size = field->size / field->arraylen;
350 		n_items = field->arraylen;
351 	} else {
352 		item_size = field->size;
353 		n_items = 1;
354 	}
355 
356 	for (i = 0; i < n_items; i++) {
357 
358 		val = read_size(event, data + field->offset + i * item_size,
359 				item_size);
360 		if (field->flags & TEP_FIELD_IS_SIGNED) {
361 			if ((long long)val >= LONG_MIN &&
362 					(long long)val <= LONG_MAX)
363 				obj = _PyLong_FromLong(val);
364 			else
365 				obj = PyLong_FromLongLong(val);
366 		} else {
367 			if (val <= LONG_MAX)
368 				obj = _PyLong_FromLong(val);
369 			else
370 				obj = PyLong_FromUnsignedLongLong(val);
371 		}
372 		if (is_array)
373 			PyList_SET_ITEM(list, i, obj);
374 	}
375 	if (is_array)
376 		obj = list;
377 	return obj;
378 }
379 
380 static const char *get_dsoname(struct map *map)
381 {
382 	const char *dsoname = "[unknown]";
383 
384 	if (map && map->dso) {
385 		if (symbol_conf.show_kernel_path && map->dso->long_name)
386 			dsoname = map->dso->long_name;
387 		else
388 			dsoname = map->dso->name;
389 	}
390 
391 	return dsoname;
392 }
393 
394 static PyObject *python_process_callchain(struct perf_sample *sample,
395 					 struct evsel *evsel,
396 					 struct addr_location *al)
397 {
398 	PyObject *pylist;
399 
400 	pylist = PyList_New(0);
401 	if (!pylist)
402 		Py_FatalError("couldn't create Python list");
403 
404 	if (!symbol_conf.use_callchain || !sample->callchain)
405 		goto exit;
406 
407 	if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
408 				      sample, NULL, NULL,
409 				      scripting_max_stack) != 0) {
410 		pr_err("Failed to resolve callchain. Skipping\n");
411 		goto exit;
412 	}
413 	callchain_cursor_commit(&callchain_cursor);
414 
415 
416 	while (1) {
417 		PyObject *pyelem;
418 		struct callchain_cursor_node *node;
419 		node = callchain_cursor_current(&callchain_cursor);
420 		if (!node)
421 			break;
422 
423 		pyelem = PyDict_New();
424 		if (!pyelem)
425 			Py_FatalError("couldn't create Python dictionary");
426 
427 
428 		pydict_set_item_string_decref(pyelem, "ip",
429 				PyLong_FromUnsignedLongLong(node->ip));
430 
431 		if (node->ms.sym) {
432 			PyObject *pysym  = PyDict_New();
433 			if (!pysym)
434 				Py_FatalError("couldn't create Python dictionary");
435 			pydict_set_item_string_decref(pysym, "start",
436 					PyLong_FromUnsignedLongLong(node->ms.sym->start));
437 			pydict_set_item_string_decref(pysym, "end",
438 					PyLong_FromUnsignedLongLong(node->ms.sym->end));
439 			pydict_set_item_string_decref(pysym, "binding",
440 					_PyLong_FromLong(node->ms.sym->binding));
441 			pydict_set_item_string_decref(pysym, "name",
442 					_PyUnicode_FromStringAndSize(node->ms.sym->name,
443 							node->ms.sym->namelen));
444 			pydict_set_item_string_decref(pyelem, "sym", pysym);
445 		}
446 
447 		if (node->ms.map) {
448 			const char *dsoname = get_dsoname(node->ms.map);
449 
450 			pydict_set_item_string_decref(pyelem, "dso",
451 					_PyUnicode_FromString(dsoname));
452 		}
453 
454 		callchain_cursor_advance(&callchain_cursor);
455 		PyList_Append(pylist, pyelem);
456 		Py_DECREF(pyelem);
457 	}
458 
459 exit:
460 	return pylist;
461 }
462 
463 static PyObject *python_process_brstack(struct perf_sample *sample,
464 					struct thread *thread)
465 {
466 	struct branch_stack *br = sample->branch_stack;
467 	struct branch_entry *entries = perf_sample__branch_entries(sample);
468 	PyObject *pylist;
469 	u64 i;
470 
471 	pylist = PyList_New(0);
472 	if (!pylist)
473 		Py_FatalError("couldn't create Python list");
474 
475 	if (!(br && br->nr))
476 		goto exit;
477 
478 	for (i = 0; i < br->nr; i++) {
479 		PyObject *pyelem;
480 		struct addr_location al;
481 		const char *dsoname;
482 
483 		pyelem = PyDict_New();
484 		if (!pyelem)
485 			Py_FatalError("couldn't create Python dictionary");
486 
487 		pydict_set_item_string_decref(pyelem, "from",
488 		    PyLong_FromUnsignedLongLong(entries[i].from));
489 		pydict_set_item_string_decref(pyelem, "to",
490 		    PyLong_FromUnsignedLongLong(entries[i].to));
491 		pydict_set_item_string_decref(pyelem, "mispred",
492 		    PyBool_FromLong(entries[i].flags.mispred));
493 		pydict_set_item_string_decref(pyelem, "predicted",
494 		    PyBool_FromLong(entries[i].flags.predicted));
495 		pydict_set_item_string_decref(pyelem, "in_tx",
496 		    PyBool_FromLong(entries[i].flags.in_tx));
497 		pydict_set_item_string_decref(pyelem, "abort",
498 		    PyBool_FromLong(entries[i].flags.abort));
499 		pydict_set_item_string_decref(pyelem, "cycles",
500 		    PyLong_FromUnsignedLongLong(entries[i].flags.cycles));
501 
502 		thread__find_map_fb(thread, sample->cpumode,
503 				    entries[i].from, &al);
504 		dsoname = get_dsoname(al.map);
505 		pydict_set_item_string_decref(pyelem, "from_dsoname",
506 					      _PyUnicode_FromString(dsoname));
507 
508 		thread__find_map_fb(thread, sample->cpumode,
509 				    entries[i].to, &al);
510 		dsoname = get_dsoname(al.map);
511 		pydict_set_item_string_decref(pyelem, "to_dsoname",
512 					      _PyUnicode_FromString(dsoname));
513 
514 		PyList_Append(pylist, pyelem);
515 		Py_DECREF(pyelem);
516 	}
517 
518 exit:
519 	return pylist;
520 }
521 
522 static unsigned long get_offset(struct symbol *sym, struct addr_location *al)
523 {
524 	unsigned long offset;
525 
526 	if (al->addr < sym->end)
527 		offset = al->addr - sym->start;
528 	else
529 		offset = al->addr - al->map->start - sym->start;
530 
531 	return offset;
532 }
533 
534 static int get_symoff(struct symbol *sym, struct addr_location *al,
535 		      bool print_off, char *bf, int size)
536 {
537 	unsigned long offset;
538 
539 	if (!sym || !sym->name[0])
540 		return scnprintf(bf, size, "%s", "[unknown]");
541 
542 	if (!print_off)
543 		return scnprintf(bf, size, "%s", sym->name);
544 
545 	offset = get_offset(sym, al);
546 
547 	return scnprintf(bf, size, "%s+0x%x", sym->name, offset);
548 }
549 
550 static int get_br_mspred(struct branch_flags *flags, char *bf, int size)
551 {
552 	if (!flags->mispred  && !flags->predicted)
553 		return scnprintf(bf, size, "%s", "-");
554 
555 	if (flags->mispred)
556 		return scnprintf(bf, size, "%s", "M");
557 
558 	return scnprintf(bf, size, "%s", "P");
559 }
560 
561 static PyObject *python_process_brstacksym(struct perf_sample *sample,
562 					   struct thread *thread)
563 {
564 	struct branch_stack *br = sample->branch_stack;
565 	struct branch_entry *entries = perf_sample__branch_entries(sample);
566 	PyObject *pylist;
567 	u64 i;
568 	char bf[512];
569 	struct addr_location al;
570 
571 	pylist = PyList_New(0);
572 	if (!pylist)
573 		Py_FatalError("couldn't create Python list");
574 
575 	if (!(br && br->nr))
576 		goto exit;
577 
578 	for (i = 0; i < br->nr; i++) {
579 		PyObject *pyelem;
580 
581 		pyelem = PyDict_New();
582 		if (!pyelem)
583 			Py_FatalError("couldn't create Python dictionary");
584 
585 		thread__find_symbol_fb(thread, sample->cpumode,
586 				       entries[i].from, &al);
587 		get_symoff(al.sym, &al, true, bf, sizeof(bf));
588 		pydict_set_item_string_decref(pyelem, "from",
589 					      _PyUnicode_FromString(bf));
590 
591 		thread__find_symbol_fb(thread, sample->cpumode,
592 				       entries[i].to, &al);
593 		get_symoff(al.sym, &al, true, bf, sizeof(bf));
594 		pydict_set_item_string_decref(pyelem, "to",
595 					      _PyUnicode_FromString(bf));
596 
597 		get_br_mspred(&entries[i].flags, bf, sizeof(bf));
598 		pydict_set_item_string_decref(pyelem, "pred",
599 					      _PyUnicode_FromString(bf));
600 
601 		if (entries[i].flags.in_tx) {
602 			pydict_set_item_string_decref(pyelem, "in_tx",
603 					      _PyUnicode_FromString("X"));
604 		} else {
605 			pydict_set_item_string_decref(pyelem, "in_tx",
606 					      _PyUnicode_FromString("-"));
607 		}
608 
609 		if (entries[i].flags.abort) {
610 			pydict_set_item_string_decref(pyelem, "abort",
611 					      _PyUnicode_FromString("A"));
612 		} else {
613 			pydict_set_item_string_decref(pyelem, "abort",
614 					      _PyUnicode_FromString("-"));
615 		}
616 
617 		PyList_Append(pylist, pyelem);
618 		Py_DECREF(pyelem);
619 	}
620 
621 exit:
622 	return pylist;
623 }
624 
625 static PyObject *get_sample_value_as_tuple(struct sample_read_value *value)
626 {
627 	PyObject *t;
628 
629 	t = PyTuple_New(2);
630 	if (!t)
631 		Py_FatalError("couldn't create Python tuple");
632 	PyTuple_SetItem(t, 0, PyLong_FromUnsignedLongLong(value->id));
633 	PyTuple_SetItem(t, 1, PyLong_FromUnsignedLongLong(value->value));
634 	return t;
635 }
636 
637 static void set_sample_read_in_dict(PyObject *dict_sample,
638 					 struct perf_sample *sample,
639 					 struct evsel *evsel)
640 {
641 	u64 read_format = evsel->core.attr.read_format;
642 	PyObject *values;
643 	unsigned int i;
644 
645 	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
646 		pydict_set_item_string_decref(dict_sample, "time_enabled",
647 			PyLong_FromUnsignedLongLong(sample->read.time_enabled));
648 	}
649 
650 	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
651 		pydict_set_item_string_decref(dict_sample, "time_running",
652 			PyLong_FromUnsignedLongLong(sample->read.time_running));
653 	}
654 
655 	if (read_format & PERF_FORMAT_GROUP)
656 		values = PyList_New(sample->read.group.nr);
657 	else
658 		values = PyList_New(1);
659 
660 	if (!values)
661 		Py_FatalError("couldn't create Python list");
662 
663 	if (read_format & PERF_FORMAT_GROUP) {
664 		for (i = 0; i < sample->read.group.nr; i++) {
665 			PyObject *t = get_sample_value_as_tuple(&sample->read.group.values[i]);
666 			PyList_SET_ITEM(values, i, t);
667 		}
668 	} else {
669 		PyObject *t = get_sample_value_as_tuple(&sample->read.one);
670 		PyList_SET_ITEM(values, 0, t);
671 	}
672 	pydict_set_item_string_decref(dict_sample, "values", values);
673 }
674 
675 static void set_sample_datasrc_in_dict(PyObject *dict,
676 				       struct perf_sample *sample)
677 {
678 	struct mem_info mi = { .data_src.val = sample->data_src };
679 	char decode[100];
680 
681 	pydict_set_item_string_decref(dict, "datasrc",
682 			PyLong_FromUnsignedLongLong(sample->data_src));
683 
684 	perf_script__meminfo_scnprintf(decode, 100, &mi);
685 
686 	pydict_set_item_string_decref(dict, "datasrc_decode",
687 			_PyUnicode_FromString(decode));
688 }
689 
690 static int regs_map(struct regs_dump *regs, uint64_t mask, char *bf, int size)
691 {
692 	unsigned int i = 0, r;
693 	int printed = 0;
694 
695 	bf[0] = 0;
696 
697 	if (!regs || !regs->regs)
698 		return 0;
699 
700 	for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
701 		u64 val = regs->regs[i++];
702 
703 		printed += scnprintf(bf + printed, size - printed,
704 				     "%5s:0x%" PRIx64 " ",
705 				     perf_reg_name(r), val);
706 	}
707 
708 	return printed;
709 }
710 
711 static void set_regs_in_dict(PyObject *dict,
712 			     struct perf_sample *sample,
713 			     struct evsel *evsel)
714 {
715 	struct perf_event_attr *attr = &evsel->core.attr;
716 	char bf[512];
717 
718 	regs_map(&sample->intr_regs, attr->sample_regs_intr, bf, sizeof(bf));
719 
720 	pydict_set_item_string_decref(dict, "iregs",
721 			_PyUnicode_FromString(bf));
722 
723 	regs_map(&sample->user_regs, attr->sample_regs_user, bf, sizeof(bf));
724 
725 	pydict_set_item_string_decref(dict, "uregs",
726 			_PyUnicode_FromString(bf));
727 }
728 
729 static PyObject *get_perf_sample_dict(struct perf_sample *sample,
730 					 struct evsel *evsel,
731 					 struct addr_location *al,
732 					 PyObject *callchain)
733 {
734 	PyObject *dict, *dict_sample, *brstack, *brstacksym;
735 
736 	dict = PyDict_New();
737 	if (!dict)
738 		Py_FatalError("couldn't create Python dictionary");
739 
740 	dict_sample = PyDict_New();
741 	if (!dict_sample)
742 		Py_FatalError("couldn't create Python dictionary");
743 
744 	pydict_set_item_string_decref(dict, "ev_name", _PyUnicode_FromString(evsel__name(evsel)));
745 	pydict_set_item_string_decref(dict, "attr", _PyBytes_FromStringAndSize((const char *)&evsel->core.attr, sizeof(evsel->core.attr)));
746 
747 	pydict_set_item_string_decref(dict_sample, "pid",
748 			_PyLong_FromLong(sample->pid));
749 	pydict_set_item_string_decref(dict_sample, "tid",
750 			_PyLong_FromLong(sample->tid));
751 	pydict_set_item_string_decref(dict_sample, "cpu",
752 			_PyLong_FromLong(sample->cpu));
753 	pydict_set_item_string_decref(dict_sample, "ip",
754 			PyLong_FromUnsignedLongLong(sample->ip));
755 	pydict_set_item_string_decref(dict_sample, "time",
756 			PyLong_FromUnsignedLongLong(sample->time));
757 	pydict_set_item_string_decref(dict_sample, "period",
758 			PyLong_FromUnsignedLongLong(sample->period));
759 	pydict_set_item_string_decref(dict_sample, "phys_addr",
760 			PyLong_FromUnsignedLongLong(sample->phys_addr));
761 	pydict_set_item_string_decref(dict_sample, "addr",
762 			PyLong_FromUnsignedLongLong(sample->addr));
763 	set_sample_read_in_dict(dict_sample, sample, evsel);
764 	pydict_set_item_string_decref(dict_sample, "weight",
765 			PyLong_FromUnsignedLongLong(sample->weight));
766 	pydict_set_item_string_decref(dict_sample, "transaction",
767 			PyLong_FromUnsignedLongLong(sample->transaction));
768 	set_sample_datasrc_in_dict(dict_sample, sample);
769 	pydict_set_item_string_decref(dict, "sample", dict_sample);
770 
771 	pydict_set_item_string_decref(dict, "raw_buf", _PyBytes_FromStringAndSize(
772 			(const char *)sample->raw_data, sample->raw_size));
773 	pydict_set_item_string_decref(dict, "comm",
774 			_PyUnicode_FromString(thread__comm_str(al->thread)));
775 	if (al->map) {
776 		pydict_set_item_string_decref(dict, "dso",
777 			_PyUnicode_FromString(al->map->dso->name));
778 	}
779 	if (al->sym) {
780 		pydict_set_item_string_decref(dict, "symbol",
781 			_PyUnicode_FromString(al->sym->name));
782 	}
783 
784 	pydict_set_item_string_decref(dict, "callchain", callchain);
785 
786 	brstack = python_process_brstack(sample, al->thread);
787 	pydict_set_item_string_decref(dict, "brstack", brstack);
788 
789 	brstacksym = python_process_brstacksym(sample, al->thread);
790 	pydict_set_item_string_decref(dict, "brstacksym", brstacksym);
791 
792 	set_regs_in_dict(dict, sample, evsel);
793 
794 	return dict;
795 }
796 
797 static void python_process_tracepoint(struct perf_sample *sample,
798 				      struct evsel *evsel,
799 				      struct addr_location *al)
800 {
801 	struct tep_event *event = evsel->tp_format;
802 	PyObject *handler, *context, *t, *obj = NULL, *callchain;
803 	PyObject *dict = NULL, *all_entries_dict = NULL;
804 	static char handler_name[256];
805 	struct tep_format_field *field;
806 	unsigned long s, ns;
807 	unsigned n = 0;
808 	int pid;
809 	int cpu = sample->cpu;
810 	void *data = sample->raw_data;
811 	unsigned long long nsecs = sample->time;
812 	const char *comm = thread__comm_str(al->thread);
813 	const char *default_handler_name = "trace_unhandled";
814 
815 	if (!event) {
816 		snprintf(handler_name, sizeof(handler_name),
817 			 "ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
818 		Py_FatalError(handler_name);
819 	}
820 
821 	pid = raw_field_value(event, "common_pid", data);
822 
823 	sprintf(handler_name, "%s__%s", event->system, event->name);
824 
825 	if (!test_and_set_bit(event->id, events_defined))
826 		define_event_symbols(event, handler_name, event->print_fmt.args);
827 
828 	handler = get_handler(handler_name);
829 	if (!handler) {
830 		handler = get_handler(default_handler_name);
831 		if (!handler)
832 			return;
833 		dict = PyDict_New();
834 		if (!dict)
835 			Py_FatalError("couldn't create Python dict");
836 	}
837 
838 	t = PyTuple_New(MAX_FIELDS);
839 	if (!t)
840 		Py_FatalError("couldn't create Python tuple");
841 
842 
843 	s = nsecs / NSEC_PER_SEC;
844 	ns = nsecs - s * NSEC_PER_SEC;
845 
846 	scripting_context->event_data = data;
847 	scripting_context->pevent = evsel->tp_format->tep;
848 
849 	context = _PyCapsule_New(scripting_context, NULL, NULL);
850 
851 	PyTuple_SetItem(t, n++, _PyUnicode_FromString(handler_name));
852 	PyTuple_SetItem(t, n++, context);
853 
854 	/* ip unwinding */
855 	callchain = python_process_callchain(sample, evsel, al);
856 	/* Need an additional reference for the perf_sample dict */
857 	Py_INCREF(callchain);
858 
859 	if (!dict) {
860 		PyTuple_SetItem(t, n++, _PyLong_FromLong(cpu));
861 		PyTuple_SetItem(t, n++, _PyLong_FromLong(s));
862 		PyTuple_SetItem(t, n++, _PyLong_FromLong(ns));
863 		PyTuple_SetItem(t, n++, _PyLong_FromLong(pid));
864 		PyTuple_SetItem(t, n++, _PyUnicode_FromString(comm));
865 		PyTuple_SetItem(t, n++, callchain);
866 	} else {
867 		pydict_set_item_string_decref(dict, "common_cpu", _PyLong_FromLong(cpu));
868 		pydict_set_item_string_decref(dict, "common_s", _PyLong_FromLong(s));
869 		pydict_set_item_string_decref(dict, "common_ns", _PyLong_FromLong(ns));
870 		pydict_set_item_string_decref(dict, "common_pid", _PyLong_FromLong(pid));
871 		pydict_set_item_string_decref(dict, "common_comm", _PyUnicode_FromString(comm));
872 		pydict_set_item_string_decref(dict, "common_callchain", callchain);
873 	}
874 	for (field = event->format.fields; field; field = field->next) {
875 		unsigned int offset, len;
876 		unsigned long long val;
877 
878 		if (field->flags & TEP_FIELD_IS_ARRAY) {
879 			offset = field->offset;
880 			len    = field->size;
881 			if (field->flags & TEP_FIELD_IS_DYNAMIC) {
882 				val     = tep_read_number(scripting_context->pevent,
883 							  data + offset, len);
884 				offset  = val;
885 				len     = offset >> 16;
886 				offset &= 0xffff;
887 			}
888 			if (field->flags & TEP_FIELD_IS_STRING &&
889 			    is_printable_array(data + offset, len)) {
890 				obj = _PyUnicode_FromString((char *) data + offset);
891 			} else {
892 				obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
893 				field->flags &= ~TEP_FIELD_IS_STRING;
894 			}
895 		} else { /* FIELD_IS_NUMERIC */
896 			obj = get_field_numeric_entry(event, field, data);
897 		}
898 		if (!dict)
899 			PyTuple_SetItem(t, n++, obj);
900 		else
901 			pydict_set_item_string_decref(dict, field->name, obj);
902 
903 	}
904 
905 	if (dict)
906 		PyTuple_SetItem(t, n++, dict);
907 
908 	if (get_argument_count(handler) == (int) n + 1) {
909 		all_entries_dict = get_perf_sample_dict(sample, evsel, al,
910 			callchain);
911 		PyTuple_SetItem(t, n++,	all_entries_dict);
912 	} else {
913 		Py_DECREF(callchain);
914 	}
915 
916 	if (_PyTuple_Resize(&t, n) == -1)
917 		Py_FatalError("error resizing Python tuple");
918 
919 	if (!dict)
920 		call_object(handler, t, handler_name);
921 	else
922 		call_object(handler, t, default_handler_name);
923 
924 	Py_DECREF(t);
925 }
926 
927 static PyObject *tuple_new(unsigned int sz)
928 {
929 	PyObject *t;
930 
931 	t = PyTuple_New(sz);
932 	if (!t)
933 		Py_FatalError("couldn't create Python tuple");
934 	return t;
935 }
936 
937 static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
938 {
939 #if BITS_PER_LONG == 64
940 	return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
941 #endif
942 #if BITS_PER_LONG == 32
943 	return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
944 #endif
945 }
946 
947 static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
948 {
949 	return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
950 }
951 
952 static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
953 {
954 	return PyTuple_SetItem(t, pos, _PyUnicode_FromString(s));
955 }
956 
957 static int tuple_set_bytes(PyObject *t, unsigned int pos, void *bytes,
958 			   unsigned int sz)
959 {
960 	return PyTuple_SetItem(t, pos, _PyBytes_FromStringAndSize(bytes, sz));
961 }
962 
963 static int python_export_evsel(struct db_export *dbe, struct evsel *evsel)
964 {
965 	struct tables *tables = container_of(dbe, struct tables, dbe);
966 	PyObject *t;
967 
968 	t = tuple_new(2);
969 
970 	tuple_set_u64(t, 0, evsel->db_id);
971 	tuple_set_string(t, 1, evsel__name(evsel));
972 
973 	call_object(tables->evsel_handler, t, "evsel_table");
974 
975 	Py_DECREF(t);
976 
977 	return 0;
978 }
979 
980 static int python_export_machine(struct db_export *dbe,
981 				 struct machine *machine)
982 {
983 	struct tables *tables = container_of(dbe, struct tables, dbe);
984 	PyObject *t;
985 
986 	t = tuple_new(3);
987 
988 	tuple_set_u64(t, 0, machine->db_id);
989 	tuple_set_s32(t, 1, machine->pid);
990 	tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
991 
992 	call_object(tables->machine_handler, t, "machine_table");
993 
994 	Py_DECREF(t);
995 
996 	return 0;
997 }
998 
999 static int python_export_thread(struct db_export *dbe, struct thread *thread,
1000 				u64 main_thread_db_id, struct machine *machine)
1001 {
1002 	struct tables *tables = container_of(dbe, struct tables, dbe);
1003 	PyObject *t;
1004 
1005 	t = tuple_new(5);
1006 
1007 	tuple_set_u64(t, 0, thread->db_id);
1008 	tuple_set_u64(t, 1, machine->db_id);
1009 	tuple_set_u64(t, 2, main_thread_db_id);
1010 	tuple_set_s32(t, 3, thread->pid_);
1011 	tuple_set_s32(t, 4, thread->tid);
1012 
1013 	call_object(tables->thread_handler, t, "thread_table");
1014 
1015 	Py_DECREF(t);
1016 
1017 	return 0;
1018 }
1019 
1020 static int python_export_comm(struct db_export *dbe, struct comm *comm,
1021 			      struct thread *thread)
1022 {
1023 	struct tables *tables = container_of(dbe, struct tables, dbe);
1024 	PyObject *t;
1025 
1026 	t = tuple_new(5);
1027 
1028 	tuple_set_u64(t, 0, comm->db_id);
1029 	tuple_set_string(t, 1, comm__str(comm));
1030 	tuple_set_u64(t, 2, thread->db_id);
1031 	tuple_set_u64(t, 3, comm->start);
1032 	tuple_set_s32(t, 4, comm->exec);
1033 
1034 	call_object(tables->comm_handler, t, "comm_table");
1035 
1036 	Py_DECREF(t);
1037 
1038 	return 0;
1039 }
1040 
1041 static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
1042 				     struct comm *comm, struct thread *thread)
1043 {
1044 	struct tables *tables = container_of(dbe, struct tables, dbe);
1045 	PyObject *t;
1046 
1047 	t = tuple_new(3);
1048 
1049 	tuple_set_u64(t, 0, db_id);
1050 	tuple_set_u64(t, 1, comm->db_id);
1051 	tuple_set_u64(t, 2, thread->db_id);
1052 
1053 	call_object(tables->comm_thread_handler, t, "comm_thread_table");
1054 
1055 	Py_DECREF(t);
1056 
1057 	return 0;
1058 }
1059 
1060 static int python_export_dso(struct db_export *dbe, struct dso *dso,
1061 			     struct machine *machine)
1062 {
1063 	struct tables *tables = container_of(dbe, struct tables, dbe);
1064 	char sbuild_id[SBUILD_ID_SIZE];
1065 	PyObject *t;
1066 
1067 	build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1068 
1069 	t = tuple_new(5);
1070 
1071 	tuple_set_u64(t, 0, dso->db_id);
1072 	tuple_set_u64(t, 1, machine->db_id);
1073 	tuple_set_string(t, 2, dso->short_name);
1074 	tuple_set_string(t, 3, dso->long_name);
1075 	tuple_set_string(t, 4, sbuild_id);
1076 
1077 	call_object(tables->dso_handler, t, "dso_table");
1078 
1079 	Py_DECREF(t);
1080 
1081 	return 0;
1082 }
1083 
1084 static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
1085 				struct dso *dso)
1086 {
1087 	struct tables *tables = container_of(dbe, struct tables, dbe);
1088 	u64 *sym_db_id = symbol__priv(sym);
1089 	PyObject *t;
1090 
1091 	t = tuple_new(6);
1092 
1093 	tuple_set_u64(t, 0, *sym_db_id);
1094 	tuple_set_u64(t, 1, dso->db_id);
1095 	tuple_set_u64(t, 2, sym->start);
1096 	tuple_set_u64(t, 3, sym->end);
1097 	tuple_set_s32(t, 4, sym->binding);
1098 	tuple_set_string(t, 5, sym->name);
1099 
1100 	call_object(tables->symbol_handler, t, "symbol_table");
1101 
1102 	Py_DECREF(t);
1103 
1104 	return 0;
1105 }
1106 
1107 static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
1108 				     const char *name)
1109 {
1110 	struct tables *tables = container_of(dbe, struct tables, dbe);
1111 	PyObject *t;
1112 
1113 	t = tuple_new(2);
1114 
1115 	tuple_set_s32(t, 0, branch_type);
1116 	tuple_set_string(t, 1, name);
1117 
1118 	call_object(tables->branch_type_handler, t, "branch_type_table");
1119 
1120 	Py_DECREF(t);
1121 
1122 	return 0;
1123 }
1124 
1125 static void python_export_sample_table(struct db_export *dbe,
1126 				       struct export_sample *es)
1127 {
1128 	struct tables *tables = container_of(dbe, struct tables, dbe);
1129 	PyObject *t;
1130 
1131 	t = tuple_new(24);
1132 
1133 	tuple_set_u64(t, 0, es->db_id);
1134 	tuple_set_u64(t, 1, es->evsel->db_id);
1135 	tuple_set_u64(t, 2, es->al->maps->machine->db_id);
1136 	tuple_set_u64(t, 3, es->al->thread->db_id);
1137 	tuple_set_u64(t, 4, es->comm_db_id);
1138 	tuple_set_u64(t, 5, es->dso_db_id);
1139 	tuple_set_u64(t, 6, es->sym_db_id);
1140 	tuple_set_u64(t, 7, es->offset);
1141 	tuple_set_u64(t, 8, es->sample->ip);
1142 	tuple_set_u64(t, 9, es->sample->time);
1143 	tuple_set_s32(t, 10, es->sample->cpu);
1144 	tuple_set_u64(t, 11, es->addr_dso_db_id);
1145 	tuple_set_u64(t, 12, es->addr_sym_db_id);
1146 	tuple_set_u64(t, 13, es->addr_offset);
1147 	tuple_set_u64(t, 14, es->sample->addr);
1148 	tuple_set_u64(t, 15, es->sample->period);
1149 	tuple_set_u64(t, 16, es->sample->weight);
1150 	tuple_set_u64(t, 17, es->sample->transaction);
1151 	tuple_set_u64(t, 18, es->sample->data_src);
1152 	tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
1153 	tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
1154 	tuple_set_u64(t, 21, es->call_path_id);
1155 	tuple_set_u64(t, 22, es->sample->insn_cnt);
1156 	tuple_set_u64(t, 23, es->sample->cyc_cnt);
1157 
1158 	call_object(tables->sample_handler, t, "sample_table");
1159 
1160 	Py_DECREF(t);
1161 }
1162 
1163 static void python_export_synth(struct db_export *dbe, struct export_sample *es)
1164 {
1165 	struct tables *tables = container_of(dbe, struct tables, dbe);
1166 	PyObject *t;
1167 
1168 	t = tuple_new(3);
1169 
1170 	tuple_set_u64(t, 0, es->db_id);
1171 	tuple_set_u64(t, 1, es->evsel->core.attr.config);
1172 	tuple_set_bytes(t, 2, es->sample->raw_data, es->sample->raw_size);
1173 
1174 	call_object(tables->synth_handler, t, "synth_data");
1175 
1176 	Py_DECREF(t);
1177 }
1178 
1179 static int python_export_sample(struct db_export *dbe,
1180 				struct export_sample *es)
1181 {
1182 	struct tables *tables = container_of(dbe, struct tables, dbe);
1183 
1184 	python_export_sample_table(dbe, es);
1185 
1186 	if (es->evsel->core.attr.type == PERF_TYPE_SYNTH && tables->synth_handler)
1187 		python_export_synth(dbe, es);
1188 
1189 	return 0;
1190 }
1191 
1192 static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
1193 {
1194 	struct tables *tables = container_of(dbe, struct tables, dbe);
1195 	PyObject *t;
1196 	u64 parent_db_id, sym_db_id;
1197 
1198 	parent_db_id = cp->parent ? cp->parent->db_id : 0;
1199 	sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
1200 
1201 	t = tuple_new(4);
1202 
1203 	tuple_set_u64(t, 0, cp->db_id);
1204 	tuple_set_u64(t, 1, parent_db_id);
1205 	tuple_set_u64(t, 2, sym_db_id);
1206 	tuple_set_u64(t, 3, cp->ip);
1207 
1208 	call_object(tables->call_path_handler, t, "call_path_table");
1209 
1210 	Py_DECREF(t);
1211 
1212 	return 0;
1213 }
1214 
1215 static int python_export_call_return(struct db_export *dbe,
1216 				     struct call_return *cr)
1217 {
1218 	struct tables *tables = container_of(dbe, struct tables, dbe);
1219 	u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
1220 	PyObject *t;
1221 
1222 	t = tuple_new(14);
1223 
1224 	tuple_set_u64(t, 0, cr->db_id);
1225 	tuple_set_u64(t, 1, cr->thread->db_id);
1226 	tuple_set_u64(t, 2, comm_db_id);
1227 	tuple_set_u64(t, 3, cr->cp->db_id);
1228 	tuple_set_u64(t, 4, cr->call_time);
1229 	tuple_set_u64(t, 5, cr->return_time);
1230 	tuple_set_u64(t, 6, cr->branch_count);
1231 	tuple_set_u64(t, 7, cr->call_ref);
1232 	tuple_set_u64(t, 8, cr->return_ref);
1233 	tuple_set_u64(t, 9, cr->cp->parent->db_id);
1234 	tuple_set_s32(t, 10, cr->flags);
1235 	tuple_set_u64(t, 11, cr->parent_db_id);
1236 	tuple_set_u64(t, 12, cr->insn_count);
1237 	tuple_set_u64(t, 13, cr->cyc_count);
1238 
1239 	call_object(tables->call_return_handler, t, "call_return_table");
1240 
1241 	Py_DECREF(t);
1242 
1243 	return 0;
1244 }
1245 
1246 static int python_export_context_switch(struct db_export *dbe, u64 db_id,
1247 					struct machine *machine,
1248 					struct perf_sample *sample,
1249 					u64 th_out_id, u64 comm_out_id,
1250 					u64 th_in_id, u64 comm_in_id, int flags)
1251 {
1252 	struct tables *tables = container_of(dbe, struct tables, dbe);
1253 	PyObject *t;
1254 
1255 	t = tuple_new(9);
1256 
1257 	tuple_set_u64(t, 0, db_id);
1258 	tuple_set_u64(t, 1, machine->db_id);
1259 	tuple_set_u64(t, 2, sample->time);
1260 	tuple_set_s32(t, 3, sample->cpu);
1261 	tuple_set_u64(t, 4, th_out_id);
1262 	tuple_set_u64(t, 5, comm_out_id);
1263 	tuple_set_u64(t, 6, th_in_id);
1264 	tuple_set_u64(t, 7, comm_in_id);
1265 	tuple_set_s32(t, 8, flags);
1266 
1267 	call_object(tables->context_switch_handler, t, "context_switch");
1268 
1269 	Py_DECREF(t);
1270 
1271 	return 0;
1272 }
1273 
1274 static int python_process_call_return(struct call_return *cr, u64 *parent_db_id,
1275 				      void *data)
1276 {
1277 	struct db_export *dbe = data;
1278 
1279 	return db_export__call_return(dbe, cr, parent_db_id);
1280 }
1281 
1282 static void python_process_general_event(struct perf_sample *sample,
1283 					 struct evsel *evsel,
1284 					 struct addr_location *al)
1285 {
1286 	PyObject *handler, *t, *dict, *callchain;
1287 	static char handler_name[64];
1288 	unsigned n = 0;
1289 
1290 	snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
1291 
1292 	handler = get_handler(handler_name);
1293 	if (!handler)
1294 		return;
1295 
1296 	/*
1297 	 * Use the MAX_FIELDS to make the function expandable, though
1298 	 * currently there is only one item for the tuple.
1299 	 */
1300 	t = PyTuple_New(MAX_FIELDS);
1301 	if (!t)
1302 		Py_FatalError("couldn't create Python tuple");
1303 
1304 	/* ip unwinding */
1305 	callchain = python_process_callchain(sample, evsel, al);
1306 	dict = get_perf_sample_dict(sample, evsel, al, callchain);
1307 
1308 	PyTuple_SetItem(t, n++, dict);
1309 	if (_PyTuple_Resize(&t, n) == -1)
1310 		Py_FatalError("error resizing Python tuple");
1311 
1312 	call_object(handler, t, handler_name);
1313 
1314 	Py_DECREF(t);
1315 }
1316 
1317 static void python_process_event(union perf_event *event,
1318 				 struct perf_sample *sample,
1319 				 struct evsel *evsel,
1320 				 struct addr_location *al)
1321 {
1322 	struct tables *tables = &tables_global;
1323 
1324 	switch (evsel->core.attr.type) {
1325 	case PERF_TYPE_TRACEPOINT:
1326 		python_process_tracepoint(sample, evsel, al);
1327 		break;
1328 	/* Reserve for future process_hw/sw/raw APIs */
1329 	default:
1330 		if (tables->db_export_mode)
1331 			db_export__sample(&tables->dbe, event, sample, evsel, al);
1332 		else
1333 			python_process_general_event(sample, evsel, al);
1334 	}
1335 }
1336 
1337 static void python_process_switch(union perf_event *event,
1338 				  struct perf_sample *sample,
1339 				  struct machine *machine)
1340 {
1341 	struct tables *tables = &tables_global;
1342 
1343 	if (tables->db_export_mode)
1344 		db_export__switch(&tables->dbe, event, sample, machine);
1345 }
1346 
1347 static void get_handler_name(char *str, size_t size,
1348 			     struct evsel *evsel)
1349 {
1350 	char *p = str;
1351 
1352 	scnprintf(str, size, "stat__%s", evsel__name(evsel));
1353 
1354 	while ((p = strchr(p, ':'))) {
1355 		*p = '_';
1356 		p++;
1357 	}
1358 }
1359 
1360 static void
1361 process_stat(struct evsel *counter, int cpu, int thread, u64 tstamp,
1362 	     struct perf_counts_values *count)
1363 {
1364 	PyObject *handler, *t;
1365 	static char handler_name[256];
1366 	int n = 0;
1367 
1368 	t = PyTuple_New(MAX_FIELDS);
1369 	if (!t)
1370 		Py_FatalError("couldn't create Python tuple");
1371 
1372 	get_handler_name(handler_name, sizeof(handler_name),
1373 			 counter);
1374 
1375 	handler = get_handler(handler_name);
1376 	if (!handler) {
1377 		pr_debug("can't find python handler %s\n", handler_name);
1378 		return;
1379 	}
1380 
1381 	PyTuple_SetItem(t, n++, _PyLong_FromLong(cpu));
1382 	PyTuple_SetItem(t, n++, _PyLong_FromLong(thread));
1383 
1384 	tuple_set_u64(t, n++, tstamp);
1385 	tuple_set_u64(t, n++, count->val);
1386 	tuple_set_u64(t, n++, count->ena);
1387 	tuple_set_u64(t, n++, count->run);
1388 
1389 	if (_PyTuple_Resize(&t, n) == -1)
1390 		Py_FatalError("error resizing Python tuple");
1391 
1392 	call_object(handler, t, handler_name);
1393 
1394 	Py_DECREF(t);
1395 }
1396 
1397 static void python_process_stat(struct perf_stat_config *config,
1398 				struct evsel *counter, u64 tstamp)
1399 {
1400 	struct perf_thread_map *threads = counter->core.threads;
1401 	struct perf_cpu_map *cpus = counter->core.cpus;
1402 	int cpu, thread;
1403 
1404 	if (config->aggr_mode == AGGR_GLOBAL) {
1405 		process_stat(counter, -1, -1, tstamp,
1406 			     &counter->counts->aggr);
1407 		return;
1408 	}
1409 
1410 	for (thread = 0; thread < threads->nr; thread++) {
1411 		for (cpu = 0; cpu < cpus->nr; cpu++) {
1412 			process_stat(counter, cpus->map[cpu],
1413 				     perf_thread_map__pid(threads, thread), tstamp,
1414 				     perf_counts(counter->counts, cpu, thread));
1415 		}
1416 	}
1417 }
1418 
1419 static void python_process_stat_interval(u64 tstamp)
1420 {
1421 	PyObject *handler, *t;
1422 	static const char handler_name[] = "stat__interval";
1423 	int n = 0;
1424 
1425 	t = PyTuple_New(MAX_FIELDS);
1426 	if (!t)
1427 		Py_FatalError("couldn't create Python tuple");
1428 
1429 	handler = get_handler(handler_name);
1430 	if (!handler) {
1431 		pr_debug("can't find python handler %s\n", handler_name);
1432 		return;
1433 	}
1434 
1435 	tuple_set_u64(t, n++, tstamp);
1436 
1437 	if (_PyTuple_Resize(&t, n) == -1)
1438 		Py_FatalError("error resizing Python tuple");
1439 
1440 	call_object(handler, t, handler_name);
1441 
1442 	Py_DECREF(t);
1443 }
1444 
1445 static int run_start_sub(void)
1446 {
1447 	main_module = PyImport_AddModule("__main__");
1448 	if (main_module == NULL)
1449 		return -1;
1450 	Py_INCREF(main_module);
1451 
1452 	main_dict = PyModule_GetDict(main_module);
1453 	if (main_dict == NULL)
1454 		goto error;
1455 	Py_INCREF(main_dict);
1456 
1457 	try_call_object("trace_begin", NULL);
1458 
1459 	return 0;
1460 
1461 error:
1462 	Py_XDECREF(main_dict);
1463 	Py_XDECREF(main_module);
1464 	return -1;
1465 }
1466 
1467 #define SET_TABLE_HANDLER_(name, handler_name, table_name) do {		\
1468 	tables->handler_name = get_handler(#table_name);		\
1469 	if (tables->handler_name)					\
1470 		tables->dbe.export_ ## name = python_export_ ## name;	\
1471 } while (0)
1472 
1473 #define SET_TABLE_HANDLER(name) \
1474 	SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
1475 
1476 static void set_table_handlers(struct tables *tables)
1477 {
1478 	const char *perf_db_export_mode = "perf_db_export_mode";
1479 	const char *perf_db_export_calls = "perf_db_export_calls";
1480 	const char *perf_db_export_callchains = "perf_db_export_callchains";
1481 	PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
1482 	bool export_calls = false;
1483 	bool export_callchains = false;
1484 	int ret;
1485 
1486 	memset(tables, 0, sizeof(struct tables));
1487 	if (db_export__init(&tables->dbe))
1488 		Py_FatalError("failed to initialize export");
1489 
1490 	db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
1491 	if (!db_export_mode)
1492 		return;
1493 
1494 	ret = PyObject_IsTrue(db_export_mode);
1495 	if (ret == -1)
1496 		handler_call_die(perf_db_export_mode);
1497 	if (!ret)
1498 		return;
1499 
1500 	/* handle export calls */
1501 	tables->dbe.crp = NULL;
1502 	db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
1503 	if (db_export_calls) {
1504 		ret = PyObject_IsTrue(db_export_calls);
1505 		if (ret == -1)
1506 			handler_call_die(perf_db_export_calls);
1507 		export_calls = !!ret;
1508 	}
1509 
1510 	if (export_calls) {
1511 		tables->dbe.crp =
1512 			call_return_processor__new(python_process_call_return,
1513 						   &tables->dbe);
1514 		if (!tables->dbe.crp)
1515 			Py_FatalError("failed to create calls processor");
1516 	}
1517 
1518 	/* handle export callchains */
1519 	tables->dbe.cpr = NULL;
1520 	db_export_callchains = PyDict_GetItemString(main_dict,
1521 						    perf_db_export_callchains);
1522 	if (db_export_callchains) {
1523 		ret = PyObject_IsTrue(db_export_callchains);
1524 		if (ret == -1)
1525 			handler_call_die(perf_db_export_callchains);
1526 		export_callchains = !!ret;
1527 	}
1528 
1529 	if (export_callchains) {
1530 		/*
1531 		 * Attempt to use the call path root from the call return
1532 		 * processor, if the call return processor is in use. Otherwise,
1533 		 * we allocate a new call path root. This prevents exporting
1534 		 * duplicate call path ids when both are in use simultaniously.
1535 		 */
1536 		if (tables->dbe.crp)
1537 			tables->dbe.cpr = tables->dbe.crp->cpr;
1538 		else
1539 			tables->dbe.cpr = call_path_root__new();
1540 
1541 		if (!tables->dbe.cpr)
1542 			Py_FatalError("failed to create call path root");
1543 	}
1544 
1545 	tables->db_export_mode = true;
1546 	/*
1547 	 * Reserve per symbol space for symbol->db_id via symbol__priv()
1548 	 */
1549 	symbol_conf.priv_size = sizeof(u64);
1550 
1551 	SET_TABLE_HANDLER(evsel);
1552 	SET_TABLE_HANDLER(machine);
1553 	SET_TABLE_HANDLER(thread);
1554 	SET_TABLE_HANDLER(comm);
1555 	SET_TABLE_HANDLER(comm_thread);
1556 	SET_TABLE_HANDLER(dso);
1557 	SET_TABLE_HANDLER(symbol);
1558 	SET_TABLE_HANDLER(branch_type);
1559 	SET_TABLE_HANDLER(sample);
1560 	SET_TABLE_HANDLER(call_path);
1561 	SET_TABLE_HANDLER(call_return);
1562 	SET_TABLE_HANDLER(context_switch);
1563 
1564 	/*
1565 	 * Synthesized events are samples but with architecture-specific data
1566 	 * stored in sample->raw_data. They are exported via
1567 	 * python_export_sample() and consequently do not need a separate export
1568 	 * callback.
1569 	 */
1570 	tables->synth_handler = get_handler("synth_data");
1571 }
1572 
1573 #if PY_MAJOR_VERSION < 3
1574 static void _free_command_line(const char **command_line, int num)
1575 {
1576 	free(command_line);
1577 }
1578 #else
1579 static void _free_command_line(wchar_t **command_line, int num)
1580 {
1581 	int i;
1582 	for (i = 0; i < num; i++)
1583 		PyMem_RawFree(command_line[i]);
1584 	free(command_line);
1585 }
1586 #endif
1587 
1588 
1589 /*
1590  * Start trace script
1591  */
1592 static int python_start_script(const char *script, int argc, const char **argv)
1593 {
1594 	struct tables *tables = &tables_global;
1595 	PyMODINIT_FUNC (*initfunc)(void);
1596 #if PY_MAJOR_VERSION < 3
1597 	const char **command_line;
1598 #else
1599 	wchar_t **command_line;
1600 #endif
1601 	/*
1602 	 * Use a non-const name variable to cope with python 2.6's
1603 	 * PyImport_AppendInittab prototype
1604 	 */
1605 	char buf[PATH_MAX], name[19] = "perf_trace_context";
1606 	int i, err = 0;
1607 	FILE *fp;
1608 
1609 #if PY_MAJOR_VERSION < 3
1610 	initfunc = initperf_trace_context;
1611 	command_line = malloc((argc + 1) * sizeof(const char *));
1612 	command_line[0] = script;
1613 	for (i = 1; i < argc + 1; i++)
1614 		command_line[i] = argv[i - 1];
1615 #else
1616 	initfunc = PyInit_perf_trace_context;
1617 	command_line = malloc((argc + 1) * sizeof(wchar_t *));
1618 	command_line[0] = Py_DecodeLocale(script, NULL);
1619 	for (i = 1; i < argc + 1; i++)
1620 		command_line[i] = Py_DecodeLocale(argv[i - 1], NULL);
1621 #endif
1622 
1623 	PyImport_AppendInittab(name, initfunc);
1624 	Py_Initialize();
1625 
1626 #if PY_MAJOR_VERSION < 3
1627 	PySys_SetArgv(argc + 1, (char **)command_line);
1628 #else
1629 	PySys_SetArgv(argc + 1, command_line);
1630 #endif
1631 
1632 	fp = fopen(script, "r");
1633 	if (!fp) {
1634 		sprintf(buf, "Can't open python script \"%s\"", script);
1635 		perror(buf);
1636 		err = -1;
1637 		goto error;
1638 	}
1639 
1640 	err = PyRun_SimpleFile(fp, script);
1641 	if (err) {
1642 		fprintf(stderr, "Error running python script %s\n", script);
1643 		goto error;
1644 	}
1645 
1646 	err = run_start_sub();
1647 	if (err) {
1648 		fprintf(stderr, "Error starting python script %s\n", script);
1649 		goto error;
1650 	}
1651 
1652 	set_table_handlers(tables);
1653 
1654 	if (tables->db_export_mode) {
1655 		err = db_export__branch_types(&tables->dbe);
1656 		if (err)
1657 			goto error;
1658 	}
1659 
1660 	_free_command_line(command_line, argc + 1);
1661 
1662 	return err;
1663 error:
1664 	Py_Finalize();
1665 	_free_command_line(command_line, argc + 1);
1666 
1667 	return err;
1668 }
1669 
1670 static int python_flush_script(void)
1671 {
1672 	return 0;
1673 }
1674 
1675 /*
1676  * Stop trace script
1677  */
1678 static int python_stop_script(void)
1679 {
1680 	struct tables *tables = &tables_global;
1681 
1682 	try_call_object("trace_end", NULL);
1683 
1684 	db_export__exit(&tables->dbe);
1685 
1686 	Py_XDECREF(main_dict);
1687 	Py_XDECREF(main_module);
1688 	Py_Finalize();
1689 
1690 	return 0;
1691 }
1692 
1693 static int python_generate_script(struct tep_handle *pevent, const char *outfile)
1694 {
1695 	int i, not_first, count, nr_events;
1696 	struct tep_event **all_events;
1697 	struct tep_event *event = NULL;
1698 	struct tep_format_field *f;
1699 	char fname[PATH_MAX];
1700 	FILE *ofp;
1701 
1702 	sprintf(fname, "%s.py", outfile);
1703 	ofp = fopen(fname, "w");
1704 	if (ofp == NULL) {
1705 		fprintf(stderr, "couldn't open %s\n", fname);
1706 		return -1;
1707 	}
1708 	fprintf(ofp, "# perf script event handlers, "
1709 		"generated by perf script -g python\n");
1710 
1711 	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
1712 		" License version 2\n\n");
1713 
1714 	fprintf(ofp, "# The common_* event handler fields are the most useful "
1715 		"fields common to\n");
1716 
1717 	fprintf(ofp, "# all events.  They don't necessarily correspond to "
1718 		"the 'common_*' fields\n");
1719 
1720 	fprintf(ofp, "# in the format files.  Those fields not available as "
1721 		"handler params can\n");
1722 
1723 	fprintf(ofp, "# be retrieved using Python functions of the form "
1724 		"common_*(context).\n");
1725 
1726 	fprintf(ofp, "# See the perf-script-python Documentation for the list "
1727 		"of available functions.\n\n");
1728 
1729 	fprintf(ofp, "from __future__ import print_function\n\n");
1730 	fprintf(ofp, "import os\n");
1731 	fprintf(ofp, "import sys\n\n");
1732 
1733 	fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
1734 	fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
1735 	fprintf(ofp, "\nfrom perf_trace_context import *\n");
1736 	fprintf(ofp, "from Core import *\n\n\n");
1737 
1738 	fprintf(ofp, "def trace_begin():\n");
1739 	fprintf(ofp, "\tprint(\"in trace_begin\")\n\n");
1740 
1741 	fprintf(ofp, "def trace_end():\n");
1742 	fprintf(ofp, "\tprint(\"in trace_end\")\n\n");
1743 
1744 	nr_events = tep_get_events_count(pevent);
1745 	all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
1746 
1747 	for (i = 0; all_events && i < nr_events; i++) {
1748 		event = all_events[i];
1749 		fprintf(ofp, "def %s__%s(", event->system, event->name);
1750 		fprintf(ofp, "event_name, ");
1751 		fprintf(ofp, "context, ");
1752 		fprintf(ofp, "common_cpu,\n");
1753 		fprintf(ofp, "\tcommon_secs, ");
1754 		fprintf(ofp, "common_nsecs, ");
1755 		fprintf(ofp, "common_pid, ");
1756 		fprintf(ofp, "common_comm,\n\t");
1757 		fprintf(ofp, "common_callchain, ");
1758 
1759 		not_first = 0;
1760 		count = 0;
1761 
1762 		for (f = event->format.fields; f; f = f->next) {
1763 			if (not_first++)
1764 				fprintf(ofp, ", ");
1765 			if (++count % 5 == 0)
1766 				fprintf(ofp, "\n\t");
1767 
1768 			fprintf(ofp, "%s", f->name);
1769 		}
1770 		if (not_first++)
1771 			fprintf(ofp, ", ");
1772 		if (++count % 5 == 0)
1773 			fprintf(ofp, "\n\t\t");
1774 		fprintf(ofp, "perf_sample_dict");
1775 
1776 		fprintf(ofp, "):\n");
1777 
1778 		fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
1779 			"common_secs, common_nsecs,\n\t\t\t"
1780 			"common_pid, common_comm)\n\n");
1781 
1782 		fprintf(ofp, "\t\tprint(\"");
1783 
1784 		not_first = 0;
1785 		count = 0;
1786 
1787 		for (f = event->format.fields; f; f = f->next) {
1788 			if (not_first++)
1789 				fprintf(ofp, ", ");
1790 			if (count && count % 3 == 0) {
1791 				fprintf(ofp, "\" \\\n\t\t\"");
1792 			}
1793 			count++;
1794 
1795 			fprintf(ofp, "%s=", f->name);
1796 			if (f->flags & TEP_FIELD_IS_STRING ||
1797 			    f->flags & TEP_FIELD_IS_FLAG ||
1798 			    f->flags & TEP_FIELD_IS_ARRAY ||
1799 			    f->flags & TEP_FIELD_IS_SYMBOLIC)
1800 				fprintf(ofp, "%%s");
1801 			else if (f->flags & TEP_FIELD_IS_SIGNED)
1802 				fprintf(ofp, "%%d");
1803 			else
1804 				fprintf(ofp, "%%u");
1805 		}
1806 
1807 		fprintf(ofp, "\" %% \\\n\t\t(");
1808 
1809 		not_first = 0;
1810 		count = 0;
1811 
1812 		for (f = event->format.fields; f; f = f->next) {
1813 			if (not_first++)
1814 				fprintf(ofp, ", ");
1815 
1816 			if (++count % 5 == 0)
1817 				fprintf(ofp, "\n\t\t");
1818 
1819 			if (f->flags & TEP_FIELD_IS_FLAG) {
1820 				if ((count - 1) % 5 != 0) {
1821 					fprintf(ofp, "\n\t\t");
1822 					count = 4;
1823 				}
1824 				fprintf(ofp, "flag_str(\"");
1825 				fprintf(ofp, "%s__%s\", ", event->system,
1826 					event->name);
1827 				fprintf(ofp, "\"%s\", %s)", f->name,
1828 					f->name);
1829 			} else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
1830 				if ((count - 1) % 5 != 0) {
1831 					fprintf(ofp, "\n\t\t");
1832 					count = 4;
1833 				}
1834 				fprintf(ofp, "symbol_str(\"");
1835 				fprintf(ofp, "%s__%s\", ", event->system,
1836 					event->name);
1837 				fprintf(ofp, "\"%s\", %s)", f->name,
1838 					f->name);
1839 			} else
1840 				fprintf(ofp, "%s", f->name);
1841 		}
1842 
1843 		fprintf(ofp, "))\n\n");
1844 
1845 		fprintf(ofp, "\t\tprint('Sample: {'+"
1846 			"get_dict_as_string(perf_sample_dict['sample'], ', ')+'}')\n\n");
1847 
1848 		fprintf(ofp, "\t\tfor node in common_callchain:");
1849 		fprintf(ofp, "\n\t\t\tif 'sym' in node:");
1850 		fprintf(ofp, "\n\t\t\t\tprint(\"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name']))");
1851 		fprintf(ofp, "\n\t\t\telse:");
1852 		fprintf(ofp, "\n\t\t\t\tprint(\"\t[%%x]\" %% (node['ip']))\n\n");
1853 		fprintf(ofp, "\t\tprint()\n\n");
1854 
1855 	}
1856 
1857 	fprintf(ofp, "def trace_unhandled(event_name, context, "
1858 		"event_fields_dict, perf_sample_dict):\n");
1859 
1860 	fprintf(ofp, "\t\tprint(get_dict_as_string(event_fields_dict))\n");
1861 	fprintf(ofp, "\t\tprint('Sample: {'+"
1862 		"get_dict_as_string(perf_sample_dict['sample'], ', ')+'}')\n\n");
1863 
1864 	fprintf(ofp, "def print_header("
1865 		"event_name, cpu, secs, nsecs, pid, comm):\n"
1866 		"\tprint(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
1867 		"(event_name, cpu, secs, nsecs, pid, comm), end=\"\")\n\n");
1868 
1869 	fprintf(ofp, "def get_dict_as_string(a_dict, delimiter=' '):\n"
1870 		"\treturn delimiter.join"
1871 		"(['%%s=%%s'%%(k,str(v))for k,v in sorted(a_dict.items())])\n");
1872 
1873 	fclose(ofp);
1874 
1875 	fprintf(stderr, "generated Python script: %s\n", fname);
1876 
1877 	return 0;
1878 }
1879 
1880 struct scripting_ops python_scripting_ops = {
1881 	.name			= "Python",
1882 	.start_script		= python_start_script,
1883 	.flush_script		= python_flush_script,
1884 	.stop_script		= python_stop_script,
1885 	.process_event		= python_process_event,
1886 	.process_switch		= python_process_switch,
1887 	.process_stat		= python_process_stat,
1888 	.process_stat_interval	= python_process_stat_interval,
1889 	.generate_script	= python_generate_script,
1890 };
1891