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7e4b21b8 TZ |
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> | |
7e4b21b8 TZ |
27 | #include <errno.h> |
28 | ||
29 | #include "../../perf.h" | |
84f5d36f | 30 | #include "../debug.h" |
fcf65bf1 | 31 | #include "../evsel.h" |
7e4b21b8 | 32 | #include "../util.h" |
743eb868 ACM |
33 | #include "../event.h" |
34 | #include "../thread.h" | |
7e4b21b8 | 35 | #include "../trace-event.h" |
0f5f5bcd | 36 | #include "../machine.h" |
7e4b21b8 TZ |
37 | |
38 | PyMODINIT_FUNC initperf_trace_context(void); | |
39 | ||
40 | #define FTRACE_MAX_EVENT \ | |
41 | ((1 << (sizeof(unsigned short) * 8)) - 1) | |
42 | ||
aaf045f7 | 43 | struct event_format *events[FTRACE_MAX_EVENT]; |
7e4b21b8 TZ |
44 | |
45 | #define MAX_FIELDS 64 | |
46 | #define N_COMMON_FIELDS 7 | |
47 | ||
48 | extern struct scripting_context *scripting_context; | |
49 | ||
50 | static char *cur_field_name; | |
51 | static int zero_flag_atom; | |
52 | ||
53 | static PyObject *main_module, *main_dict; | |
54 | ||
05f832e3 | 55 | static void handler_call_die(const char *handler_name) NORETURN; |
7e4b21b8 TZ |
56 | static void handler_call_die(const char *handler_name) |
57 | { | |
58 | PyErr_Print(); | |
59 | Py_FatalError("problem in Python trace event handler"); | |
05f832e3 JS |
60 | // Py_FatalError does not return |
61 | // but we have to make the compiler happy | |
62 | abort(); | |
7e4b21b8 TZ |
63 | } |
64 | ||
c0268e8d JS |
65 | /* |
66 | * Insert val into into the dictionary and decrement the reference counter. | |
67 | * This is necessary for dictionaries since PyDict_SetItemString() does not | |
68 | * steal a reference, as opposed to PyTuple_SetItem(). | |
69 | */ | |
70 | static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val) | |
71 | { | |
72 | PyDict_SetItemString(dict, key, val); | |
73 | Py_DECREF(val); | |
74 | } | |
75 | ||
a5563edf AH |
76 | static PyObject *get_handler(const char *handler_name) |
77 | { | |
78 | PyObject *handler; | |
79 | ||
80 | handler = PyDict_GetItemString(main_dict, handler_name); | |
81 | if (handler && !PyCallable_Check(handler)) | |
82 | return NULL; | |
83 | return handler; | |
84 | } | |
85 | ||
86 | static void call_object(PyObject *handler, PyObject *args, const char *die_msg) | |
87 | { | |
88 | PyObject *retval; | |
89 | ||
90 | retval = PyObject_CallObject(handler, args); | |
91 | if (retval == NULL) | |
92 | handler_call_die(die_msg); | |
93 | Py_DECREF(retval); | |
94 | } | |
95 | ||
96 | static void try_call_object(const char *handler_name, PyObject *args) | |
97 | { | |
98 | PyObject *handler; | |
99 | ||
100 | handler = get_handler(handler_name); | |
101 | if (handler) | |
102 | call_object(handler, args, handler_name); | |
103 | } | |
104 | ||
7e4b21b8 TZ |
105 | static void define_value(enum print_arg_type field_type, |
106 | const char *ev_name, | |
107 | const char *field_name, | |
108 | const char *field_value, | |
109 | const char *field_str) | |
110 | { | |
111 | const char *handler_name = "define_flag_value"; | |
a5563edf | 112 | PyObject *t; |
7e4b21b8 TZ |
113 | unsigned long long value; |
114 | unsigned n = 0; | |
115 | ||
116 | if (field_type == PRINT_SYMBOL) | |
117 | handler_name = "define_symbolic_value"; | |
118 | ||
44ad9cd8 | 119 | t = PyTuple_New(4); |
7e4b21b8 TZ |
120 | if (!t) |
121 | Py_FatalError("couldn't create Python tuple"); | |
122 | ||
123 | value = eval_flag(field_value); | |
124 | ||
125 | PyTuple_SetItem(t, n++, PyString_FromString(ev_name)); | |
126 | PyTuple_SetItem(t, n++, PyString_FromString(field_name)); | |
127 | PyTuple_SetItem(t, n++, PyInt_FromLong(value)); | |
128 | PyTuple_SetItem(t, n++, PyString_FromString(field_str)); | |
129 | ||
a5563edf | 130 | try_call_object(handler_name, t); |
7e4b21b8 TZ |
131 | |
132 | Py_DECREF(t); | |
133 | } | |
134 | ||
135 | static void define_values(enum print_arg_type field_type, | |
136 | struct print_flag_sym *field, | |
137 | const char *ev_name, | |
138 | const char *field_name) | |
139 | { | |
140 | define_value(field_type, ev_name, field_name, field->value, | |
141 | field->str); | |
142 | ||
143 | if (field->next) | |
144 | define_values(field_type, field->next, ev_name, field_name); | |
145 | } | |
146 | ||
147 | static void define_field(enum print_arg_type field_type, | |
148 | const char *ev_name, | |
149 | const char *field_name, | |
150 | const char *delim) | |
151 | { | |
152 | const char *handler_name = "define_flag_field"; | |
a5563edf | 153 | PyObject *t; |
7e4b21b8 TZ |
154 | unsigned n = 0; |
155 | ||
156 | if (field_type == PRINT_SYMBOL) | |
157 | handler_name = "define_symbolic_field"; | |
158 | ||
44ad9cd8 TZ |
159 | if (field_type == PRINT_FLAGS) |
160 | t = PyTuple_New(3); | |
161 | else | |
162 | t = PyTuple_New(2); | |
7e4b21b8 TZ |
163 | if (!t) |
164 | Py_FatalError("couldn't create Python tuple"); | |
165 | ||
166 | PyTuple_SetItem(t, n++, PyString_FromString(ev_name)); | |
167 | PyTuple_SetItem(t, n++, PyString_FromString(field_name)); | |
168 | if (field_type == PRINT_FLAGS) | |
169 | PyTuple_SetItem(t, n++, PyString_FromString(delim)); | |
170 | ||
a5563edf | 171 | try_call_object(handler_name, t); |
7e4b21b8 TZ |
172 | |
173 | Py_DECREF(t); | |
174 | } | |
175 | ||
aaf045f7 | 176 | static void define_event_symbols(struct event_format *event, |
7e4b21b8 TZ |
177 | const char *ev_name, |
178 | struct print_arg *args) | |
179 | { | |
180 | switch (args->type) { | |
181 | case PRINT_NULL: | |
182 | break; | |
183 | case PRINT_ATOM: | |
184 | define_value(PRINT_FLAGS, ev_name, cur_field_name, "0", | |
185 | args->atom.atom); | |
186 | zero_flag_atom = 0; | |
187 | break; | |
188 | case PRINT_FIELD: | |
f5385650 | 189 | free(cur_field_name); |
7e4b21b8 TZ |
190 | cur_field_name = strdup(args->field.name); |
191 | break; | |
192 | case PRINT_FLAGS: | |
193 | define_event_symbols(event, ev_name, args->flags.field); | |
194 | define_field(PRINT_FLAGS, ev_name, cur_field_name, | |
195 | args->flags.delim); | |
196 | define_values(PRINT_FLAGS, args->flags.flags, ev_name, | |
197 | cur_field_name); | |
198 | break; | |
199 | case PRINT_SYMBOL: | |
200 | define_event_symbols(event, ev_name, args->symbol.field); | |
201 | define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL); | |
202 | define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name, | |
203 | cur_field_name); | |
204 | break; | |
e080e6f1 NK |
205 | case PRINT_HEX: |
206 | define_event_symbols(event, ev_name, args->hex.field); | |
207 | define_event_symbols(event, ev_name, args->hex.size); | |
208 | break; | |
7e4b21b8 TZ |
209 | case PRINT_STRING: |
210 | break; | |
211 | case PRINT_TYPE: | |
212 | define_event_symbols(event, ev_name, args->typecast.item); | |
213 | break; | |
214 | case PRINT_OP: | |
215 | if (strcmp(args->op.op, ":") == 0) | |
216 | zero_flag_atom = 1; | |
217 | define_event_symbols(event, ev_name, args->op.left); | |
218 | define_event_symbols(event, ev_name, args->op.right); | |
219 | break; | |
220 | default: | |
aaf045f7 SR |
221 | /* gcc warns for these? */ |
222 | case PRINT_BSTRING: | |
223 | case PRINT_DYNAMIC_ARRAY: | |
224 | case PRINT_FUNC: | |
473a778a | 225 | case PRINT_BITMASK: |
7e4b21b8 TZ |
226 | /* we should warn... */ |
227 | return; | |
228 | } | |
229 | ||
230 | if (args->next) | |
231 | define_event_symbols(event, ev_name, args->next); | |
232 | } | |
233 | ||
fcf65bf1 | 234 | static inline struct event_format *find_cache_event(struct perf_evsel *evsel) |
7e4b21b8 TZ |
235 | { |
236 | static char ev_name[256]; | |
aaf045f7 | 237 | struct event_format *event; |
fcf65bf1 | 238 | int type = evsel->attr.config; |
7e4b21b8 | 239 | |
fcf65bf1 ACM |
240 | /* |
241 | * XXX: Do we really need to cache this since now we have evsel->tp_format | |
242 | * cached already? Need to re-read this "cache" routine that as well calls | |
243 | * define_event_symbols() :-\ | |
244 | */ | |
7e4b21b8 TZ |
245 | if (events[type]) |
246 | return events[type]; | |
247 | ||
fcf65bf1 | 248 | events[type] = event = evsel->tp_format; |
7e4b21b8 TZ |
249 | if (!event) |
250 | return NULL; | |
251 | ||
252 | sprintf(ev_name, "%s__%s", event->system, event->name); | |
253 | ||
254 | define_event_symbols(event, ev_name, event->print_fmt.args); | |
255 | ||
256 | return event; | |
257 | } | |
258 | ||
33058b94 SAS |
259 | static PyObject *get_field_numeric_entry(struct event_format *event, |
260 | struct format_field *field, void *data) | |
261 | { | |
8ac631cd SAS |
262 | bool is_array = field->flags & FIELD_IS_ARRAY; |
263 | PyObject *obj, *list = NULL; | |
33058b94 | 264 | unsigned long long val; |
8ac631cd | 265 | unsigned int item_size, n_items, i; |
33058b94 | 266 | |
8ac631cd SAS |
267 | if (is_array) { |
268 | list = PyList_New(field->arraylen); | |
269 | item_size = field->size / field->arraylen; | |
270 | n_items = field->arraylen; | |
33058b94 | 271 | } else { |
8ac631cd SAS |
272 | item_size = field->size; |
273 | n_items = 1; | |
33058b94 | 274 | } |
8ac631cd SAS |
275 | |
276 | for (i = 0; i < n_items; i++) { | |
277 | ||
278 | val = read_size(event, data + field->offset + i * item_size, | |
279 | item_size); | |
280 | if (field->flags & FIELD_IS_SIGNED) { | |
281 | if ((long long)val >= LONG_MIN && | |
282 | (long long)val <= LONG_MAX) | |
283 | obj = PyInt_FromLong(val); | |
284 | else | |
285 | obj = PyLong_FromLongLong(val); | |
286 | } else { | |
287 | if (val <= LONG_MAX) | |
288 | obj = PyInt_FromLong(val); | |
289 | else | |
290 | obj = PyLong_FromUnsignedLongLong(val); | |
291 | } | |
292 | if (is_array) | |
293 | PyList_SET_ITEM(list, i, obj); | |
294 | } | |
295 | if (is_array) | |
296 | obj = list; | |
33058b94 SAS |
297 | return obj; |
298 | } | |
299 | ||
0f5f5bcd JS |
300 | |
301 | static PyObject *python_process_callchain(struct perf_sample *sample, | |
302 | struct perf_evsel *evsel, | |
303 | struct addr_location *al) | |
304 | { | |
305 | PyObject *pylist; | |
306 | ||
307 | pylist = PyList_New(0); | |
308 | if (!pylist) | |
309 | Py_FatalError("couldn't create Python list"); | |
310 | ||
311 | if (!symbol_conf.use_callchain || !sample->callchain) | |
312 | goto exit; | |
313 | ||
314 | if (machine__resolve_callchain(al->machine, evsel, al->thread, | |
315 | sample, NULL, NULL, | |
316 | PERF_MAX_STACK_DEPTH) != 0) { | |
317 | pr_err("Failed to resolve callchain. Skipping\n"); | |
318 | goto exit; | |
319 | } | |
320 | callchain_cursor_commit(&callchain_cursor); | |
321 | ||
322 | ||
323 | while (1) { | |
324 | PyObject *pyelem; | |
325 | struct callchain_cursor_node *node; | |
326 | node = callchain_cursor_current(&callchain_cursor); | |
327 | if (!node) | |
328 | break; | |
329 | ||
330 | pyelem = PyDict_New(); | |
331 | if (!pyelem) | |
332 | Py_FatalError("couldn't create Python dictionary"); | |
333 | ||
334 | ||
335 | pydict_set_item_string_decref(pyelem, "ip", | |
336 | PyLong_FromUnsignedLongLong(node->ip)); | |
337 | ||
338 | if (node->sym) { | |
339 | PyObject *pysym = PyDict_New(); | |
340 | if (!pysym) | |
341 | Py_FatalError("couldn't create Python dictionary"); | |
342 | pydict_set_item_string_decref(pysym, "start", | |
343 | PyLong_FromUnsignedLongLong(node->sym->start)); | |
344 | pydict_set_item_string_decref(pysym, "end", | |
345 | PyLong_FromUnsignedLongLong(node->sym->end)); | |
346 | pydict_set_item_string_decref(pysym, "binding", | |
347 | PyInt_FromLong(node->sym->binding)); | |
348 | pydict_set_item_string_decref(pysym, "name", | |
349 | PyString_FromStringAndSize(node->sym->name, | |
350 | node->sym->namelen)); | |
351 | pydict_set_item_string_decref(pyelem, "sym", pysym); | |
352 | } | |
353 | ||
354 | if (node->map) { | |
355 | struct map *map = node->map; | |
356 | const char *dsoname = "[unknown]"; | |
357 | if (map && map->dso && (map->dso->name || map->dso->long_name)) { | |
358 | if (symbol_conf.show_kernel_path && map->dso->long_name) | |
359 | dsoname = map->dso->long_name; | |
360 | else if (map->dso->name) | |
361 | dsoname = map->dso->name; | |
362 | } | |
363 | pydict_set_item_string_decref(pyelem, "dso", | |
364 | PyString_FromString(dsoname)); | |
365 | } | |
366 | ||
367 | callchain_cursor_advance(&callchain_cursor); | |
368 | PyList_Append(pylist, pyelem); | |
369 | Py_DECREF(pyelem); | |
370 | } | |
371 | ||
372 | exit: | |
373 | return pylist; | |
374 | } | |
375 | ||
376 | ||
b7fff6b5 ACM |
377 | static void python_process_tracepoint(struct perf_sample *sample, |
378 | struct perf_evsel *evsel, | |
379 | struct thread *thread, | |
380 | struct addr_location *al) | |
7e4b21b8 | 381 | { |
a5563edf | 382 | PyObject *handler, *context, *t, *obj, *callchain; |
0f5f5bcd | 383 | PyObject *dict = NULL; |
7e4b21b8 TZ |
384 | static char handler_name[256]; |
385 | struct format_field *field; | |
7e4b21b8 | 386 | unsigned long s, ns; |
aaf045f7 | 387 | struct event_format *event; |
7e4b21b8 | 388 | unsigned n = 0; |
7e4b21b8 | 389 | int pid; |
be6d842a DA |
390 | int cpu = sample->cpu; |
391 | void *data = sample->raw_data; | |
392 | unsigned long long nsecs = sample->time; | |
b9c5143a | 393 | const char *comm = thread__comm_str(thread); |
7e4b21b8 TZ |
394 | |
395 | t = PyTuple_New(MAX_FIELDS); | |
396 | if (!t) | |
397 | Py_FatalError("couldn't create Python tuple"); | |
398 | ||
fcf65bf1 | 399 | event = find_cache_event(evsel); |
7e4b21b8 | 400 | if (!event) |
fcf65bf1 | 401 | die("ug! no event found for type %d", (int)evsel->attr.config); |
7e4b21b8 | 402 | |
97822433 | 403 | pid = raw_field_value(event, "common_pid", data); |
7e4b21b8 TZ |
404 | |
405 | sprintf(handler_name, "%s__%s", event->system, event->name); | |
406 | ||
a5563edf | 407 | handler = get_handler(handler_name); |
c0251485 PT |
408 | if (!handler) { |
409 | dict = PyDict_New(); | |
410 | if (!dict) | |
411 | Py_FatalError("couldn't create Python dict"); | |
412 | } | |
7e4b21b8 TZ |
413 | s = nsecs / NSECS_PER_SEC; |
414 | ns = nsecs - s * NSECS_PER_SEC; | |
415 | ||
416 | scripting_context->event_data = data; | |
2de9533d | 417 | scripting_context->pevent = evsel->tp_format->pevent; |
7e4b21b8 TZ |
418 | |
419 | context = PyCObject_FromVoidPtr(scripting_context, NULL); | |
420 | ||
421 | PyTuple_SetItem(t, n++, PyString_FromString(handler_name)); | |
fb7d0b3c | 422 | PyTuple_SetItem(t, n++, context); |
7e4b21b8 | 423 | |
0f5f5bcd JS |
424 | /* ip unwinding */ |
425 | callchain = python_process_callchain(sample, evsel, al); | |
426 | ||
c0251485 PT |
427 | if (handler) { |
428 | PyTuple_SetItem(t, n++, PyInt_FromLong(cpu)); | |
429 | PyTuple_SetItem(t, n++, PyInt_FromLong(s)); | |
430 | PyTuple_SetItem(t, n++, PyInt_FromLong(ns)); | |
431 | PyTuple_SetItem(t, n++, PyInt_FromLong(pid)); | |
432 | PyTuple_SetItem(t, n++, PyString_FromString(comm)); | |
0f5f5bcd | 433 | PyTuple_SetItem(t, n++, callchain); |
c0251485 | 434 | } else { |
c0268e8d JS |
435 | pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu)); |
436 | pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s)); | |
437 | pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns)); | |
438 | pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid)); | |
439 | pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm)); | |
0f5f5bcd | 440 | pydict_set_item_string_decref(dict, "common_callchain", callchain); |
c0251485 | 441 | } |
7e4b21b8 TZ |
442 | for (field = event->format.fields; field; field = field->next) { |
443 | if (field->flags & FIELD_IS_STRING) { | |
444 | int offset; | |
445 | if (field->flags & FIELD_IS_DYNAMIC) { | |
446 | offset = *(int *)(data + field->offset); | |
447 | offset &= 0xffff; | |
448 | } else | |
449 | offset = field->offset; | |
b1dcc03c | 450 | obj = PyString_FromString((char *)data + offset); |
7e4b21b8 | 451 | } else { /* FIELD_IS_NUMERIC */ |
33058b94 | 452 | obj = get_field_numeric_entry(event, field, data); |
7e4b21b8 | 453 | } |
c0251485 PT |
454 | if (handler) |
455 | PyTuple_SetItem(t, n++, obj); | |
456 | else | |
c0268e8d | 457 | pydict_set_item_string_decref(dict, field->name, obj); |
c0251485 | 458 | |
7e4b21b8 | 459 | } |
0f5f5bcd | 460 | |
c0251485 PT |
461 | if (!handler) |
462 | PyTuple_SetItem(t, n++, dict); | |
7e4b21b8 TZ |
463 | |
464 | if (_PyTuple_Resize(&t, n) == -1) | |
465 | Py_FatalError("error resizing Python tuple"); | |
466 | ||
c0251485 | 467 | if (handler) { |
a5563edf | 468 | call_object(handler, t, handler_name); |
7e4b21b8 | 469 | } else { |
a5563edf | 470 | try_call_object("trace_unhandled", t); |
c0251485 | 471 | Py_DECREF(dict); |
7e4b21b8 TZ |
472 | } |
473 | ||
474 | Py_DECREF(t); | |
475 | } | |
476 | ||
b7fff6b5 | 477 | static void python_process_general_event(struct perf_sample *sample, |
6a6daec2 | 478 | struct perf_evsel *evsel, |
2eaa1b40 | 479 | struct thread *thread, |
87b6a3ad | 480 | struct addr_location *al) |
6a6daec2 | 481 | { |
a5563edf | 482 | PyObject *handler, *t, *dict, *callchain, *dict_sample; |
6a6daec2 FT |
483 | static char handler_name[64]; |
484 | unsigned n = 0; | |
6a6daec2 | 485 | |
fd6b858a FT |
486 | /* |
487 | * Use the MAX_FIELDS to make the function expandable, though | |
87b6a3ad | 488 | * currently there is only one item for the tuple. |
fd6b858a | 489 | */ |
6a6daec2 FT |
490 | t = PyTuple_New(MAX_FIELDS); |
491 | if (!t) | |
492 | Py_FatalError("couldn't create Python tuple"); | |
493 | ||
fd6b858a FT |
494 | dict = PyDict_New(); |
495 | if (!dict) | |
496 | Py_FatalError("couldn't create Python dictionary"); | |
497 | ||
57608cfd JS |
498 | dict_sample = PyDict_New(); |
499 | if (!dict_sample) | |
500 | Py_FatalError("couldn't create Python dictionary"); | |
501 | ||
6a6daec2 FT |
502 | snprintf(handler_name, sizeof(handler_name), "%s", "process_event"); |
503 | ||
a5563edf AH |
504 | handler = get_handler(handler_name); |
505 | if (!handler) | |
6a6daec2 | 506 | goto exit; |
6a6daec2 | 507 | |
c0268e8d JS |
508 | pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel))); |
509 | pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize( | |
fd6b858a | 510 | (const char *)&evsel->attr, sizeof(evsel->attr))); |
57608cfd JS |
511 | |
512 | pydict_set_item_string_decref(dict_sample, "pid", | |
513 | PyInt_FromLong(sample->pid)); | |
514 | pydict_set_item_string_decref(dict_sample, "tid", | |
515 | PyInt_FromLong(sample->tid)); | |
516 | pydict_set_item_string_decref(dict_sample, "cpu", | |
517 | PyInt_FromLong(sample->cpu)); | |
518 | pydict_set_item_string_decref(dict_sample, "ip", | |
519 | PyLong_FromUnsignedLongLong(sample->ip)); | |
520 | pydict_set_item_string_decref(dict_sample, "time", | |
521 | PyLong_FromUnsignedLongLong(sample->time)); | |
522 | pydict_set_item_string_decref(dict_sample, "period", | |
523 | PyLong_FromUnsignedLongLong(sample->period)); | |
524 | pydict_set_item_string_decref(dict, "sample", dict_sample); | |
525 | ||
c0268e8d | 526 | pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize( |
fd6b858a | 527 | (const char *)sample->raw_data, sample->raw_size)); |
c0268e8d | 528 | pydict_set_item_string_decref(dict, "comm", |
b9c5143a | 529 | PyString_FromString(thread__comm_str(thread))); |
fd6b858a | 530 | if (al->map) { |
c0268e8d | 531 | pydict_set_item_string_decref(dict, "dso", |
fd6b858a FT |
532 | PyString_FromString(al->map->dso->name)); |
533 | } | |
534 | if (al->sym) { | |
c0268e8d | 535 | pydict_set_item_string_decref(dict, "symbol", |
fd6b858a FT |
536 | PyString_FromString(al->sym->name)); |
537 | } | |
6a6daec2 | 538 | |
0f5f5bcd JS |
539 | /* ip unwinding */ |
540 | callchain = python_process_callchain(sample, evsel, al); | |
541 | pydict_set_item_string_decref(dict, "callchain", callchain); | |
542 | ||
fd6b858a | 543 | PyTuple_SetItem(t, n++, dict); |
6a6daec2 FT |
544 | if (_PyTuple_Resize(&t, n) == -1) |
545 | Py_FatalError("error resizing Python tuple"); | |
546 | ||
a5563edf | 547 | call_object(handler, t, handler_name); |
6a6daec2 | 548 | exit: |
fd6b858a | 549 | Py_DECREF(dict); |
6a6daec2 FT |
550 | Py_DECREF(t); |
551 | } | |
552 | ||
b7fff6b5 | 553 | static void python_process_event(union perf_event *event __maybe_unused, |
6a6daec2 FT |
554 | struct perf_sample *sample, |
555 | struct perf_evsel *evsel, | |
2eaa1b40 | 556 | struct thread *thread, |
73994dc1 | 557 | struct addr_location *al) |
6a6daec2 FT |
558 | { |
559 | switch (evsel->attr.type) { | |
560 | case PERF_TYPE_TRACEPOINT: | |
b7fff6b5 | 561 | python_process_tracepoint(sample, evsel, thread, al); |
6a6daec2 FT |
562 | break; |
563 | /* Reserve for future process_hw/sw/raw APIs */ | |
564 | default: | |
b7fff6b5 | 565 | python_process_general_event(sample, evsel, thread, al); |
6a6daec2 FT |
566 | } |
567 | } | |
568 | ||
7e4b21b8 TZ |
569 | static int run_start_sub(void) |
570 | { | |
7e4b21b8 TZ |
571 | main_module = PyImport_AddModule("__main__"); |
572 | if (main_module == NULL) | |
573 | return -1; | |
574 | Py_INCREF(main_module); | |
575 | ||
576 | main_dict = PyModule_GetDict(main_module); | |
a5563edf | 577 | if (main_dict == NULL) |
7e4b21b8 | 578 | goto error; |
7e4b21b8 TZ |
579 | Py_INCREF(main_dict); |
580 | ||
a5563edf | 581 | try_call_object("trace_begin", NULL); |
7e4b21b8 | 582 | |
a5563edf | 583 | return 0; |
7e4b21b8 | 584 | |
7e4b21b8 TZ |
585 | error: |
586 | Py_XDECREF(main_dict); | |
587 | Py_XDECREF(main_module); | |
a5563edf | 588 | return -1; |
7e4b21b8 TZ |
589 | } |
590 | ||
591 | /* | |
592 | * Start trace script | |
593 | */ | |
594 | static int python_start_script(const char *script, int argc, const char **argv) | |
595 | { | |
596 | const char **command_line; | |
597 | char buf[PATH_MAX]; | |
598 | int i, err = 0; | |
599 | FILE *fp; | |
600 | ||
601 | command_line = malloc((argc + 1) * sizeof(const char *)); | |
602 | command_line[0] = script; | |
603 | for (i = 1; i < argc + 1; i++) | |
604 | command_line[i] = argv[i - 1]; | |
605 | ||
606 | Py_Initialize(); | |
607 | ||
608 | initperf_trace_context(); | |
609 | ||
610 | PySys_SetArgv(argc + 1, (char **)command_line); | |
611 | ||
612 | fp = fopen(script, "r"); | |
613 | if (!fp) { | |
614 | sprintf(buf, "Can't open python script \"%s\"", script); | |
615 | perror(buf); | |
616 | err = -1; | |
617 | goto error; | |
618 | } | |
619 | ||
620 | err = PyRun_SimpleFile(fp, script); | |
621 | if (err) { | |
622 | fprintf(stderr, "Error running python script %s\n", script); | |
623 | goto error; | |
624 | } | |
625 | ||
626 | err = run_start_sub(); | |
627 | if (err) { | |
628 | fprintf(stderr, "Error starting python script %s\n", script); | |
629 | goto error; | |
630 | } | |
631 | ||
632 | free(command_line); | |
7e4b21b8 TZ |
633 | |
634 | return err; | |
635 | error: | |
636 | Py_Finalize(); | |
637 | free(command_line); | |
638 | ||
639 | return err; | |
640 | } | |
641 | ||
d445dd2a AH |
642 | static int python_flush_script(void) |
643 | { | |
644 | return 0; | |
645 | } | |
646 | ||
7e4b21b8 TZ |
647 | /* |
648 | * Stop trace script | |
649 | */ | |
650 | static int python_stop_script(void) | |
651 | { | |
a5563edf | 652 | try_call_object("trace_end", NULL); |
7e4b21b8 | 653 | |
7e4b21b8 TZ |
654 | Py_XDECREF(main_dict); |
655 | Py_XDECREF(main_module); | |
656 | Py_Finalize(); | |
657 | ||
a5563edf | 658 | return 0; |
7e4b21b8 TZ |
659 | } |
660 | ||
da378962 | 661 | static int python_generate_script(struct pevent *pevent, const char *outfile) |
7e4b21b8 | 662 | { |
aaf045f7 | 663 | struct event_format *event = NULL; |
7e4b21b8 TZ |
664 | struct format_field *f; |
665 | char fname[PATH_MAX]; | |
666 | int not_first, count; | |
667 | FILE *ofp; | |
668 | ||
669 | sprintf(fname, "%s.py", outfile); | |
670 | ofp = fopen(fname, "w"); | |
671 | if (ofp == NULL) { | |
672 | fprintf(stderr, "couldn't open %s\n", fname); | |
673 | return -1; | |
674 | } | |
133dc4c3 IM |
675 | fprintf(ofp, "# perf script event handlers, " |
676 | "generated by perf script -g python\n"); | |
7e4b21b8 TZ |
677 | |
678 | fprintf(ofp, "# Licensed under the terms of the GNU GPL" | |
679 | " License version 2\n\n"); | |
680 | ||
681 | fprintf(ofp, "# The common_* event handler fields are the most useful " | |
682 | "fields common to\n"); | |
683 | ||
684 | fprintf(ofp, "# all events. They don't necessarily correspond to " | |
685 | "the 'common_*' fields\n"); | |
686 | ||
687 | fprintf(ofp, "# in the format files. Those fields not available as " | |
688 | "handler params can\n"); | |
689 | ||
690 | fprintf(ofp, "# be retrieved using Python functions of the form " | |
691 | "common_*(context).\n"); | |
692 | ||
693 | fprintf(ofp, "# See the perf-trace-python Documentation for the list " | |
694 | "of available functions.\n\n"); | |
695 | ||
696 | fprintf(ofp, "import os\n"); | |
697 | fprintf(ofp, "import sys\n\n"); | |
698 | ||
699 | fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n"); | |
700 | fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n"); | |
701 | fprintf(ofp, "\nfrom perf_trace_context import *\n"); | |
702 | fprintf(ofp, "from Core import *\n\n\n"); | |
703 | ||
704 | fprintf(ofp, "def trace_begin():\n"); | |
705 | fprintf(ofp, "\tprint \"in trace_begin\"\n\n"); | |
706 | ||
707 | fprintf(ofp, "def trace_end():\n"); | |
708 | fprintf(ofp, "\tprint \"in trace_end\"\n\n"); | |
709 | ||
da378962 | 710 | while ((event = trace_find_next_event(pevent, event))) { |
7e4b21b8 TZ |
711 | fprintf(ofp, "def %s__%s(", event->system, event->name); |
712 | fprintf(ofp, "event_name, "); | |
713 | fprintf(ofp, "context, "); | |
714 | fprintf(ofp, "common_cpu,\n"); | |
715 | fprintf(ofp, "\tcommon_secs, "); | |
716 | fprintf(ofp, "common_nsecs, "); | |
717 | fprintf(ofp, "common_pid, "); | |
718 | fprintf(ofp, "common_comm,\n\t"); | |
0f5f5bcd | 719 | fprintf(ofp, "common_callchain, "); |
7e4b21b8 TZ |
720 | |
721 | not_first = 0; | |
722 | count = 0; | |
723 | ||
724 | for (f = event->format.fields; f; f = f->next) { | |
725 | if (not_first++) | |
726 | fprintf(ofp, ", "); | |
727 | if (++count % 5 == 0) | |
728 | fprintf(ofp, "\n\t"); | |
729 | ||
730 | fprintf(ofp, "%s", f->name); | |
731 | } | |
732 | fprintf(ofp, "):\n"); | |
733 | ||
734 | fprintf(ofp, "\t\tprint_header(event_name, common_cpu, " | |
735 | "common_secs, common_nsecs,\n\t\t\t" | |
736 | "common_pid, common_comm)\n\n"); | |
737 | ||
738 | fprintf(ofp, "\t\tprint \""); | |
739 | ||
740 | not_first = 0; | |
741 | count = 0; | |
742 | ||
743 | for (f = event->format.fields; f; f = f->next) { | |
744 | if (not_first++) | |
745 | fprintf(ofp, ", "); | |
746 | if (count && count % 3 == 0) { | |
747 | fprintf(ofp, "\" \\\n\t\t\""); | |
748 | } | |
749 | count++; | |
750 | ||
751 | fprintf(ofp, "%s=", f->name); | |
752 | if (f->flags & FIELD_IS_STRING || | |
753 | f->flags & FIELD_IS_FLAG || | |
e646fe73 | 754 | f->flags & FIELD_IS_ARRAY || |
7e4b21b8 TZ |
755 | f->flags & FIELD_IS_SYMBOLIC) |
756 | fprintf(ofp, "%%s"); | |
757 | else if (f->flags & FIELD_IS_SIGNED) | |
758 | fprintf(ofp, "%%d"); | |
759 | else | |
760 | fprintf(ofp, "%%u"); | |
761 | } | |
762 | ||
0f5f5bcd | 763 | fprintf(ofp, "\" %% \\\n\t\t("); |
7e4b21b8 TZ |
764 | |
765 | not_first = 0; | |
766 | count = 0; | |
767 | ||
768 | for (f = event->format.fields; f; f = f->next) { | |
769 | if (not_first++) | |
770 | fprintf(ofp, ", "); | |
771 | ||
772 | if (++count % 5 == 0) | |
773 | fprintf(ofp, "\n\t\t"); | |
774 | ||
775 | if (f->flags & FIELD_IS_FLAG) { | |
776 | if ((count - 1) % 5 != 0) { | |
777 | fprintf(ofp, "\n\t\t"); | |
778 | count = 4; | |
779 | } | |
780 | fprintf(ofp, "flag_str(\""); | |
781 | fprintf(ofp, "%s__%s\", ", event->system, | |
782 | event->name); | |
783 | fprintf(ofp, "\"%s\", %s)", f->name, | |
784 | f->name); | |
785 | } else if (f->flags & FIELD_IS_SYMBOLIC) { | |
786 | if ((count - 1) % 5 != 0) { | |
787 | fprintf(ofp, "\n\t\t"); | |
788 | count = 4; | |
789 | } | |
790 | fprintf(ofp, "symbol_str(\""); | |
791 | fprintf(ofp, "%s__%s\", ", event->system, | |
792 | event->name); | |
793 | fprintf(ofp, "\"%s\", %s)", f->name, | |
794 | f->name); | |
795 | } else | |
796 | fprintf(ofp, "%s", f->name); | |
797 | } | |
798 | ||
0f5f5bcd JS |
799 | fprintf(ofp, ")\n\n"); |
800 | ||
801 | fprintf(ofp, "\t\tfor node in common_callchain:"); | |
802 | fprintf(ofp, "\n\t\t\tif 'sym' in node:"); | |
803 | fprintf(ofp, "\n\t\t\t\tprint \"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name'])"); | |
804 | fprintf(ofp, "\n\t\t\telse:"); | |
805 | fprintf(ofp, "\n\t\t\t\tprint \"\t[%%x]\" %% (node['ip'])\n\n"); | |
806 | fprintf(ofp, "\t\tprint \"\\n\"\n\n"); | |
807 | ||
7e4b21b8 TZ |
808 | } |
809 | ||
810 | fprintf(ofp, "def trace_unhandled(event_name, context, " | |
c0251485 | 811 | "event_fields_dict):\n"); |
7e4b21b8 | 812 | |
c0251485 PT |
813 | fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))" |
814 | "for k,v in sorted(event_fields_dict.items())])\n\n"); | |
7e4b21b8 TZ |
815 | |
816 | fprintf(ofp, "def print_header(" | |
817 | "event_name, cpu, secs, nsecs, pid, comm):\n" | |
818 | "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t" | |
819 | "(event_name, cpu, secs, nsecs, pid, comm),\n"); | |
820 | ||
821 | fclose(ofp); | |
822 | ||
823 | fprintf(stderr, "generated Python script: %s\n", fname); | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
828 | struct scripting_ops python_scripting_ops = { | |
829 | .name = "Python", | |
830 | .start_script = python_start_script, | |
d445dd2a | 831 | .flush_script = python_flush_script, |
7e4b21b8 TZ |
832 | .stop_script = python_stop_script, |
833 | .process_event = python_process_event, | |
834 | .generate_script = python_generate_script, | |
835 | }; |