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