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0235b0db | 1 | # SPDX-License-Identifier: MIT |
584af91e | 2 | # |
0235b0db | 3 | # Copyright (C) 2019 Philippe Proulx <pproulx@efficios.com> |
584af91e | 4 | # |
584af91e | 5 | |
584af91e | 6 | import os |
584af91e | 7 | import re |
5995b304 SM |
8 | import sys |
9 | import json | |
584af91e PP |
10 | import socket |
11 | import struct | |
5995b304 SM |
12 | import logging |
13 | import os.path | |
14 | import argparse | |
584af91e | 15 | import tempfile |
5995b304 | 16 | import collections.abc |
78169723 | 17 | from collections import namedtuple |
584af91e PP |
18 | |
19 | ||
20 | class UnexpectedInput(RuntimeError): | |
21 | pass | |
22 | ||
23 | ||
ee1171e5 SM |
24 | # An entry within the index of an LTTng data stream. |
25 | class _LttngDataStreamIndexEntry: | |
26 | def __init__( | |
27 | self, | |
28 | offset_bytes, | |
29 | total_size_bits, | |
30 | content_size_bits, | |
31 | timestamp_begin, | |
32 | timestamp_end, | |
33 | events_discarded, | |
34 | stream_class_id, | |
35 | ): | |
36 | self._offset_bytes = offset_bytes | |
37 | self._total_size_bits = total_size_bits | |
38 | self._content_size_bits = content_size_bits | |
39 | self._timestamp_begin = timestamp_begin | |
40 | self._timestamp_end = timestamp_end | |
41 | self._events_discarded = events_discarded | |
42 | self._stream_class_id = stream_class_id | |
43 | ||
44 | @property | |
45 | def offset_bytes(self): | |
46 | return self._offset_bytes | |
47 | ||
48 | @property | |
49 | def total_size_bits(self): | |
50 | return self._total_size_bits | |
51 | ||
52 | @property | |
53 | def total_size_bytes(self): | |
54 | return self._total_size_bits // 8 | |
55 | ||
56 | @property | |
57 | def content_size_bits(self): | |
58 | return self._content_size_bits | |
59 | ||
60 | @property | |
61 | def content_size_bytes(self): | |
62 | return self._content_size_bits // 8 | |
63 | ||
64 | @property | |
65 | def timestamp_begin(self): | |
66 | return self._timestamp_begin | |
67 | ||
68 | @property | |
69 | def timestamp_end(self): | |
70 | return self._timestamp_end | |
71 | ||
72 | @property | |
73 | def events_discarded(self): | |
74 | return self._events_discarded | |
75 | ||
76 | @property | |
77 | def stream_class_id(self): | |
78 | return self._stream_class_id | |
79 | ||
80 | ||
81 | # An entry within the index of an LTTng data stream. While a stream beacon entry | |
82 | # is conceptually unrelated to an index, it is sent as a reply to a | |
83 | # LttngLiveViewerGetNextDataStreamIndexEntryCommand | |
84 | class _LttngDataStreamBeaconEntry: | |
85 | def __init__(self, stream_class_id, timestamp): | |
86 | self._stream_class_id = stream_class_id | |
87 | self._timestamp = timestamp | |
88 | ||
89 | @property | |
90 | def timestamp(self): | |
91 | return self._timestamp | |
92 | ||
93 | @property | |
94 | def stream_class_id(self): | |
95 | return self._stream_class_id | |
96 | ||
97 | ||
584af91e PP |
98 | class _LttngLiveViewerCommand: |
99 | def __init__(self, version): | |
100 | self._version = version | |
101 | ||
102 | @property | |
103 | def version(self): | |
104 | return self._version | |
105 | ||
106 | ||
107 | class _LttngLiveViewerConnectCommand(_LttngLiveViewerCommand): | |
108 | def __init__(self, version, viewer_session_id, major, minor): | |
109 | super().__init__(version) | |
110 | self._viewer_session_id = viewer_session_id | |
111 | self._major = major | |
112 | self._minor = minor | |
113 | ||
114 | @property | |
115 | def viewer_session_id(self): | |
116 | return self._viewer_session_id | |
117 | ||
118 | @property | |
119 | def major(self): | |
120 | return self._major | |
121 | ||
122 | @property | |
123 | def minor(self): | |
124 | return self._minor | |
125 | ||
126 | ||
127 | class _LttngLiveViewerConnectReply: | |
128 | def __init__(self, viewer_session_id, major, minor): | |
129 | self._viewer_session_id = viewer_session_id | |
130 | self._major = major | |
131 | self._minor = minor | |
132 | ||
133 | @property | |
134 | def viewer_session_id(self): | |
135 | return self._viewer_session_id | |
136 | ||
137 | @property | |
138 | def major(self): | |
139 | return self._major | |
140 | ||
141 | @property | |
142 | def minor(self): | |
143 | return self._minor | |
144 | ||
145 | ||
146 | class _LttngLiveViewerGetTracingSessionInfosCommand(_LttngLiveViewerCommand): | |
147 | pass | |
148 | ||
149 | ||
150 | class _LttngLiveViewerTracingSessionInfo: | |
151 | def __init__( | |
152 | self, | |
153 | tracing_session_id, | |
154 | live_timer_freq, | |
155 | client_count, | |
156 | stream_count, | |
157 | hostname, | |
158 | name, | |
159 | ): | |
160 | self._tracing_session_id = tracing_session_id | |
161 | self._live_timer_freq = live_timer_freq | |
162 | self._client_count = client_count | |
163 | self._stream_count = stream_count | |
164 | self._hostname = hostname | |
165 | self._name = name | |
166 | ||
167 | @property | |
168 | def tracing_session_id(self): | |
169 | return self._tracing_session_id | |
170 | ||
171 | @property | |
172 | def live_timer_freq(self): | |
173 | return self._live_timer_freq | |
174 | ||
175 | @property | |
176 | def client_count(self): | |
177 | return self._client_count | |
178 | ||
179 | @property | |
180 | def stream_count(self): | |
181 | return self._stream_count | |
182 | ||
183 | @property | |
184 | def hostname(self): | |
185 | return self._hostname | |
186 | ||
187 | @property | |
188 | def name(self): | |
189 | return self._name | |
190 | ||
191 | ||
192 | class _LttngLiveViewerGetTracingSessionInfosReply: | |
193 | def __init__(self, tracing_session_infos): | |
194 | self._tracing_session_infos = tracing_session_infos | |
195 | ||
196 | @property | |
197 | def tracing_session_infos(self): | |
198 | return self._tracing_session_infos | |
199 | ||
200 | ||
201 | class _LttngLiveViewerAttachToTracingSessionCommand(_LttngLiveViewerCommand): | |
202 | class SeekType: | |
203 | BEGINNING = 1 | |
204 | LAST = 2 | |
205 | ||
206 | def __init__(self, version, tracing_session_id, offset, seek_type): | |
207 | super().__init__(version) | |
208 | self._tracing_session_id = tracing_session_id | |
209 | self._offset = offset | |
210 | self._seek_type = seek_type | |
211 | ||
212 | @property | |
213 | def tracing_session_id(self): | |
214 | return self._tracing_session_id | |
215 | ||
216 | @property | |
217 | def offset(self): | |
218 | return self._offset | |
219 | ||
220 | @property | |
221 | def seek_type(self): | |
222 | return self._seek_type | |
223 | ||
224 | ||
225 | class _LttngLiveViewerStreamInfo: | |
226 | def __init__(self, id, trace_id, is_metadata, path, channel_name): | |
227 | self._id = id | |
228 | self._trace_id = trace_id | |
229 | self._is_metadata = is_metadata | |
230 | self._path = path | |
231 | self._channel_name = channel_name | |
232 | ||
233 | @property | |
234 | def id(self): | |
235 | return self._id | |
236 | ||
237 | @property | |
238 | def trace_id(self): | |
239 | return self._trace_id | |
240 | ||
241 | @property | |
242 | def is_metadata(self): | |
243 | return self._is_metadata | |
244 | ||
245 | @property | |
246 | def path(self): | |
247 | return self._path | |
248 | ||
249 | @property | |
250 | def channel_name(self): | |
251 | return self._channel_name | |
252 | ||
253 | ||
254 | class _LttngLiveViewerAttachToTracingSessionReply: | |
255 | class Status: | |
256 | OK = 1 | |
257 | ALREADY = 2 | |
258 | UNKNOWN = 3 | |
259 | NOT_LIVE = 4 | |
260 | SEEK_ERROR = 5 | |
261 | NO_SESSION = 6 | |
262 | ||
263 | def __init__(self, status, stream_infos): | |
264 | self._status = status | |
265 | self._stream_infos = stream_infos | |
266 | ||
267 | @property | |
268 | def status(self): | |
269 | return self._status | |
270 | ||
271 | @property | |
272 | def stream_infos(self): | |
273 | return self._stream_infos | |
274 | ||
275 | ||
276 | class _LttngLiveViewerGetNextDataStreamIndexEntryCommand(_LttngLiveViewerCommand): | |
277 | def __init__(self, version, stream_id): | |
278 | super().__init__(version) | |
279 | self._stream_id = stream_id | |
280 | ||
281 | @property | |
282 | def stream_id(self): | |
283 | return self._stream_id | |
284 | ||
285 | ||
286 | class _LttngLiveViewerGetNextDataStreamIndexEntryReply: | |
287 | class Status: | |
288 | OK = 1 | |
289 | RETRY = 2 | |
290 | HUP = 3 | |
291 | ERROR = 4 | |
292 | INACTIVE = 5 | |
293 | EOF = 6 | |
294 | ||
295 | def __init__(self, status, index_entry, has_new_metadata, has_new_data_stream): | |
296 | self._status = status | |
297 | self._index_entry = index_entry | |
298 | self._has_new_metadata = has_new_metadata | |
299 | self._has_new_data_stream = has_new_data_stream | |
300 | ||
301 | @property | |
302 | def status(self): | |
303 | return self._status | |
304 | ||
305 | @property | |
306 | def index_entry(self): | |
307 | return self._index_entry | |
308 | ||
309 | @property | |
310 | def has_new_metadata(self): | |
311 | return self._has_new_metadata | |
312 | ||
313 | @property | |
314 | def has_new_data_stream(self): | |
315 | return self._has_new_data_stream | |
316 | ||
317 | ||
318 | class _LttngLiveViewerGetDataStreamPacketDataCommand(_LttngLiveViewerCommand): | |
319 | def __init__(self, version, stream_id, offset, req_length): | |
320 | super().__init__(version) | |
321 | self._stream_id = stream_id | |
322 | self._offset = offset | |
323 | self._req_length = req_length | |
324 | ||
325 | @property | |
326 | def stream_id(self): | |
327 | return self._stream_id | |
328 | ||
329 | @property | |
330 | def offset(self): | |
331 | return self._offset | |
332 | ||
333 | @property | |
334 | def req_length(self): | |
335 | return self._req_length | |
336 | ||
337 | ||
338 | class _LttngLiveViewerGetDataStreamPacketDataReply: | |
339 | class Status: | |
340 | OK = 1 | |
341 | RETRY = 2 | |
342 | ERROR = 3 | |
343 | EOF = 4 | |
344 | ||
345 | def __init__(self, status, data, has_new_metadata, has_new_data_stream): | |
346 | self._status = status | |
347 | self._data = data | |
348 | self._has_new_metadata = has_new_metadata | |
349 | self._has_new_data_stream = has_new_data_stream | |
350 | ||
351 | @property | |
352 | def status(self): | |
353 | return self._status | |
354 | ||
355 | @property | |
356 | def data(self): | |
357 | return self._data | |
358 | ||
359 | @property | |
360 | def has_new_metadata(self): | |
361 | return self._has_new_metadata | |
362 | ||
363 | @property | |
364 | def has_new_data_stream(self): | |
365 | return self._has_new_data_stream | |
366 | ||
367 | ||
368 | class _LttngLiveViewerGetMetadataStreamDataCommand(_LttngLiveViewerCommand): | |
369 | def __init__(self, version, stream_id): | |
370 | super().__init__(version) | |
371 | self._stream_id = stream_id | |
372 | ||
373 | @property | |
374 | def stream_id(self): | |
375 | return self._stream_id | |
376 | ||
377 | ||
378 | class _LttngLiveViewerGetMetadataStreamDataContentReply: | |
379 | class Status: | |
380 | OK = 1 | |
381 | NO_NEW = 2 | |
382 | ERROR = 3 | |
383 | ||
384 | def __init__(self, status, data): | |
385 | self._status = status | |
386 | self._data = data | |
387 | ||
388 | @property | |
389 | def status(self): | |
390 | return self._status | |
391 | ||
392 | @property | |
393 | def data(self): | |
394 | return self._data | |
395 | ||
396 | ||
397 | class _LttngLiveViewerGetNewStreamInfosCommand(_LttngLiveViewerCommand): | |
398 | def __init__(self, version, tracing_session_id): | |
399 | super().__init__(version) | |
400 | self._tracing_session_id = tracing_session_id | |
401 | ||
402 | @property | |
403 | def tracing_session_id(self): | |
404 | return self._tracing_session_id | |
405 | ||
406 | ||
407 | class _LttngLiveViewerGetNewStreamInfosReply: | |
408 | class Status: | |
409 | OK = 1 | |
410 | NO_NEW = 2 | |
411 | ERROR = 3 | |
412 | HUP = 4 | |
413 | ||
414 | def __init__(self, status, stream_infos): | |
415 | self._status = status | |
416 | self._stream_infos = stream_infos | |
417 | ||
418 | @property | |
419 | def status(self): | |
420 | return self._status | |
421 | ||
422 | @property | |
423 | def stream_infos(self): | |
424 | return self._stream_infos | |
425 | ||
426 | ||
427 | class _LttngLiveViewerCreateViewerSessionCommand(_LttngLiveViewerCommand): | |
428 | pass | |
429 | ||
430 | ||
431 | class _LttngLiveViewerCreateViewerSessionReply: | |
432 | class Status: | |
433 | OK = 1 | |
434 | ERROR = 2 | |
435 | ||
436 | def __init__(self, status): | |
437 | self._status = status | |
438 | ||
439 | @property | |
440 | def status(self): | |
441 | return self._status | |
442 | ||
443 | ||
444 | class _LttngLiveViewerDetachFromTracingSessionCommand(_LttngLiveViewerCommand): | |
445 | def __init__(self, version, tracing_session_id): | |
446 | super().__init__(version) | |
447 | self._tracing_session_id = tracing_session_id | |
448 | ||
449 | @property | |
450 | def tracing_session_id(self): | |
451 | return self._tracing_session_id | |
452 | ||
453 | ||
454 | class _LttngLiveViewerDetachFromTracingSessionReply: | |
455 | class Status: | |
456 | OK = 1 | |
457 | UNKNOWN = 2 | |
458 | ERROR = 3 | |
459 | ||
460 | def __init__(self, status): | |
461 | self._status = status | |
462 | ||
463 | @property | |
464 | def status(self): | |
465 | return self._status | |
466 | ||
467 | ||
468 | # An LTTng live protocol codec can convert bytes to command objects and | |
469 | # reply objects to bytes. | |
470 | class _LttngLiveViewerProtocolCodec: | |
f5567ea8 | 471 | _COMMAND_HEADER_STRUCT_FMT = "QII" |
584af91e PP |
472 | _COMMAND_HEADER_SIZE_BYTES = struct.calcsize(_COMMAND_HEADER_STRUCT_FMT) |
473 | ||
474 | def __init__(self): | |
475 | pass | |
476 | ||
477 | def _unpack(self, fmt, data, offset=0): | |
f5567ea8 | 478 | fmt = "!" + fmt |
584af91e PP |
479 | return struct.unpack_from(fmt, data, offset) |
480 | ||
481 | def _unpack_payload(self, fmt, data): | |
482 | return self._unpack( | |
483 | fmt, data, _LttngLiveViewerProtocolCodec._COMMAND_HEADER_SIZE_BYTES | |
484 | ) | |
485 | ||
486 | def decode(self, data): | |
487 | if len(data) < self._COMMAND_HEADER_SIZE_BYTES: | |
488 | # Not enough data to read the command header | |
489 | return | |
490 | ||
491 | payload_size, cmd_type, version = self._unpack( | |
492 | self._COMMAND_HEADER_STRUCT_FMT, data | |
493 | ) | |
494 | logging.info( | |
f5567ea8 | 495 | "Decoded command header: payload-size={}, cmd-type={}, version={}".format( |
584af91e PP |
496 | payload_size, cmd_type, version |
497 | ) | |
498 | ) | |
499 | ||
500 | if len(data) < self._COMMAND_HEADER_SIZE_BYTES + payload_size: | |
501 | # Not enough data to read the whole command | |
502 | return | |
503 | ||
504 | if cmd_type == 1: | |
505 | viewer_session_id, major, minor, conn_type = self._unpack_payload( | |
f5567ea8 | 506 | "QIII", data |
584af91e PP |
507 | ) |
508 | return _LttngLiveViewerConnectCommand( | |
509 | version, viewer_session_id, major, minor | |
510 | ) | |
511 | elif cmd_type == 2: | |
512 | return _LttngLiveViewerGetTracingSessionInfosCommand(version) | |
513 | elif cmd_type == 3: | |
f5567ea8 | 514 | tracing_session_id, offset, seek_type = self._unpack_payload("QQI", data) |
584af91e PP |
515 | return _LttngLiveViewerAttachToTracingSessionCommand( |
516 | version, tracing_session_id, offset, seek_type | |
517 | ) | |
518 | elif cmd_type == 4: | |
f5567ea8 | 519 | (stream_id,) = self._unpack_payload("Q", data) |
584af91e PP |
520 | return _LttngLiveViewerGetNextDataStreamIndexEntryCommand( |
521 | version, stream_id | |
522 | ) | |
523 | elif cmd_type == 5: | |
f5567ea8 | 524 | stream_id, offset, req_length = self._unpack_payload("QQI", data) |
584af91e PP |
525 | return _LttngLiveViewerGetDataStreamPacketDataCommand( |
526 | version, stream_id, offset, req_length | |
527 | ) | |
528 | elif cmd_type == 6: | |
f5567ea8 | 529 | (stream_id,) = self._unpack_payload("Q", data) |
584af91e PP |
530 | return _LttngLiveViewerGetMetadataStreamDataCommand(version, stream_id) |
531 | elif cmd_type == 7: | |
f5567ea8 | 532 | (tracing_session_id,) = self._unpack_payload("Q", data) |
584af91e PP |
533 | return _LttngLiveViewerGetNewStreamInfosCommand(version, tracing_session_id) |
534 | elif cmd_type == 8: | |
535 | return _LttngLiveViewerCreateViewerSessionCommand(version) | |
536 | elif cmd_type == 9: | |
f5567ea8 | 537 | (tracing_session_id,) = self._unpack_payload("Q", data) |
584af91e PP |
538 | return _LttngLiveViewerDetachFromTracingSessionCommand( |
539 | version, tracing_session_id | |
540 | ) | |
541 | else: | |
f5567ea8 | 542 | raise UnexpectedInput("Unknown command type {}".format(cmd_type)) |
584af91e PP |
543 | |
544 | def _pack(self, fmt, *args): | |
545 | # Force network byte order | |
f5567ea8 | 546 | return struct.pack("!" + fmt, *args) |
584af91e PP |
547 | |
548 | def _encode_zero_padded_str(self, string, length): | |
549 | data = string.encode() | |
f5567ea8 | 550 | return data.ljust(length, b"\x00") |
584af91e PP |
551 | |
552 | def _encode_stream_info(self, info): | |
f5567ea8 | 553 | data = self._pack("QQI", info.id, info.trace_id, int(info.is_metadata)) |
584af91e PP |
554 | data += self._encode_zero_padded_str(info.path, 4096) |
555 | data += self._encode_zero_padded_str(info.channel_name, 255) | |
556 | return data | |
557 | ||
558 | def _get_has_new_stuff_flags(self, has_new_metadata, has_new_data_streams): | |
559 | flags = 0 | |
560 | ||
561 | if has_new_metadata: | |
562 | flags |= 1 | |
563 | ||
564 | if has_new_data_streams: | |
565 | flags |= 2 | |
566 | ||
567 | return flags | |
568 | ||
569 | def encode(self, reply): | |
570 | if type(reply) is _LttngLiveViewerConnectReply: | |
571 | data = self._pack( | |
f5567ea8 | 572 | "QIII", reply.viewer_session_id, reply.major, reply.minor, 2 |
584af91e PP |
573 | ) |
574 | elif type(reply) is _LttngLiveViewerGetTracingSessionInfosReply: | |
f5567ea8 | 575 | data = self._pack("I", len(reply.tracing_session_infos)) |
584af91e PP |
576 | |
577 | for info in reply.tracing_session_infos: | |
578 | data += self._pack( | |
f5567ea8 | 579 | "QIII", |
584af91e PP |
580 | info.tracing_session_id, |
581 | info.live_timer_freq, | |
582 | info.client_count, | |
583 | info.stream_count, | |
584 | ) | |
585 | data += self._encode_zero_padded_str(info.hostname, 64) | |
586 | data += self._encode_zero_padded_str(info.name, 255) | |
587 | elif type(reply) is _LttngLiveViewerAttachToTracingSessionReply: | |
f5567ea8 | 588 | data = self._pack("II", reply.status, len(reply.stream_infos)) |
584af91e PP |
589 | |
590 | for info in reply.stream_infos: | |
591 | data += self._encode_stream_info(info) | |
592 | elif type(reply) is _LttngLiveViewerGetNextDataStreamIndexEntryReply: | |
f5567ea8 | 593 | index_format = "QQQQQQQII" |
584af91e PP |
594 | entry = reply.index_entry |
595 | flags = self._get_has_new_stuff_flags( | |
596 | reply.has_new_metadata, reply.has_new_data_stream | |
597 | ) | |
598 | ||
71f56e5f JG |
599 | if type(entry) is _LttngDataStreamIndexEntry: |
600 | data = self._pack( | |
601 | index_format, | |
602 | entry.offset_bytes, | |
603 | entry.total_size_bits, | |
604 | entry.content_size_bits, | |
605 | entry.timestamp_begin, | |
606 | entry.timestamp_end, | |
607 | entry.events_discarded, | |
608 | entry.stream_class_id, | |
609 | reply.status, | |
610 | flags, | |
611 | ) | |
612 | else: | |
613 | assert type(entry) is _LttngDataStreamBeaconEntry | |
614 | data = self._pack( | |
615 | index_format, | |
616 | 0, | |
617 | 0, | |
618 | 0, | |
619 | 0, | |
620 | entry.timestamp, | |
621 | 0, | |
622 | entry.stream_class_id, | |
623 | reply.status, | |
624 | flags, | |
625 | ) | |
584af91e PP |
626 | elif type(reply) is _LttngLiveViewerGetDataStreamPacketDataReply: |
627 | flags = self._get_has_new_stuff_flags( | |
628 | reply.has_new_metadata, reply.has_new_data_stream | |
629 | ) | |
f5567ea8 | 630 | data = self._pack("III", reply.status, len(reply.data), flags) |
584af91e PP |
631 | data += reply.data |
632 | elif type(reply) is _LttngLiveViewerGetMetadataStreamDataContentReply: | |
f5567ea8 | 633 | data = self._pack("QI", len(reply.data), reply.status) |
584af91e PP |
634 | data += reply.data |
635 | elif type(reply) is _LttngLiveViewerGetNewStreamInfosReply: | |
f5567ea8 | 636 | data = self._pack("II", reply.status, len(reply.stream_infos)) |
584af91e PP |
637 | |
638 | for info in reply.stream_infos: | |
639 | data += self._encode_stream_info(info) | |
640 | elif type(reply) is _LttngLiveViewerCreateViewerSessionReply: | |
f5567ea8 | 641 | data = self._pack("I", reply.status) |
584af91e | 642 | elif type(reply) is _LttngLiveViewerDetachFromTracingSessionReply: |
f5567ea8 | 643 | data = self._pack("I", reply.status) |
584af91e PP |
644 | else: |
645 | raise ValueError( | |
f5567ea8 | 646 | "Unknown reply object with class `{}`".format(reply.__class__.__name__) |
584af91e PP |
647 | ) |
648 | ||
649 | return data | |
650 | ||
651 | ||
78169723 FD |
652 | def _get_entry_timestamp_begin(entry): |
653 | if type(entry) is _LttngDataStreamBeaconEntry: | |
654 | return entry.timestamp | |
655 | else: | |
656 | assert type(entry) is _LttngDataStreamIndexEntry | |
657 | return entry.timestamp_begin | |
658 | ||
659 | ||
584af91e PP |
660 | # The index of an LTTng data stream, a sequence of index entries. |
661 | class _LttngDataStreamIndex(collections.abc.Sequence): | |
71f56e5f | 662 | def __init__(self, path, beacons): |
584af91e PP |
663 | self._path = path |
664 | self._build() | |
71f56e5f JG |
665 | |
666 | if beacons: | |
667 | stream_class_id = self._entries[0].stream_class_id | |
668 | beacons = [ | |
669 | _LttngDataStreamBeaconEntry(stream_class_id, ts) for ts in beacons | |
670 | ] | |
671 | self._add_beacons(beacons) | |
672 | ||
584af91e PP |
673 | logging.info( |
674 | 'Built data stream index entries: path="{}", count={}'.format( | |
675 | path, len(self._entries) | |
676 | ) | |
677 | ) | |
678 | ||
679 | def _build(self): | |
680 | self._entries = [] | |
681 | assert os.path.isfile(self._path) | |
682 | ||
f5567ea8 | 683 | with open(self._path, "rb") as f: |
584af91e | 684 | # Read header first |
f5567ea8 | 685 | fmt = ">IIII" |
584af91e PP |
686 | size = struct.calcsize(fmt) |
687 | data = f.read(size) | |
688 | assert len(data) == size | |
689 | magic, index_major, index_minor, index_entry_length = struct.unpack( | |
690 | fmt, data | |
691 | ) | |
692 | assert magic == 0xC1F1DCC1 | |
693 | ||
694 | # Read index entries | |
f5567ea8 | 695 | fmt = ">QQQQQQQ" |
584af91e PP |
696 | size = struct.calcsize(fmt) |
697 | ||
698 | while True: | |
699 | logging.debug( | |
700 | 'Decoding data stream index entry: path="{}", offset={}'.format( | |
701 | self._path, f.tell() | |
702 | ) | |
703 | ) | |
704 | data = f.read(size) | |
705 | ||
706 | if not data: | |
707 | # Done | |
708 | break | |
709 | ||
710 | assert len(data) == size | |
75882e97 FD |
711 | ( |
712 | offset_bytes, | |
713 | total_size_bits, | |
714 | content_size_bits, | |
715 | timestamp_begin, | |
716 | timestamp_end, | |
717 | events_discarded, | |
718 | stream_class_id, | |
719 | ) = struct.unpack(fmt, data) | |
584af91e PP |
720 | |
721 | self._entries.append( | |
722 | _LttngDataStreamIndexEntry( | |
723 | offset_bytes, | |
724 | total_size_bits, | |
725 | content_size_bits, | |
726 | timestamp_begin, | |
727 | timestamp_end, | |
728 | events_discarded, | |
729 | stream_class_id, | |
730 | ) | |
731 | ) | |
732 | ||
733 | # Skip anything else before the next entry | |
734 | f.seek(index_entry_length - size, os.SEEK_CUR) | |
735 | ||
71f56e5f JG |
736 | def _add_beacons(self, beacons): |
737 | # Assumes entries[n + 1].timestamp_end >= entries[n].timestamp_begin | |
738 | def sort_key(entry): | |
739 | if type(entry) is _LttngDataStreamBeaconEntry: | |
740 | return entry.timestamp | |
741 | else: | |
742 | return entry.timestamp_end | |
743 | ||
744 | self._entries += beacons | |
745 | self._entries.sort(key=sort_key) | |
746 | ||
584af91e PP |
747 | def __getitem__(self, index): |
748 | return self._entries[index] | |
749 | ||
750 | def __len__(self): | |
751 | return len(self._entries) | |
752 | ||
753 | @property | |
754 | def path(self): | |
755 | return self._path | |
756 | ||
757 | ||
758 | # An LTTng data stream. | |
759 | class _LttngDataStream: | |
71f56e5f | 760 | def __init__(self, path, beacons): |
584af91e PP |
761 | self._path = path |
762 | filename = os.path.basename(path) | |
f5567ea8 | 763 | match = re.match(r"(.*)_\d+", filename) |
584af91e PP |
764 | self._channel_name = match.group(1) |
765 | trace_dir = os.path.dirname(path) | |
f5567ea8 | 766 | index_path = os.path.join(trace_dir, "index", filename + ".idx") |
71f56e5f | 767 | self._index = _LttngDataStreamIndex(index_path, beacons) |
584af91e | 768 | assert os.path.isfile(path) |
f5567ea8 | 769 | self._file = open(path, "rb") |
584af91e PP |
770 | logging.info( |
771 | 'Built data stream: path="{}", channel-name="{}"'.format( | |
772 | path, self._channel_name | |
773 | ) | |
774 | ) | |
775 | ||
776 | @property | |
777 | def path(self): | |
778 | return self._path | |
779 | ||
780 | @property | |
781 | def channel_name(self): | |
782 | return self._channel_name | |
783 | ||
784 | @property | |
785 | def index(self): | |
786 | return self._index | |
787 | ||
788 | def get_data(self, offset_bytes, len_bytes): | |
789 | self._file.seek(offset_bytes) | |
790 | return self._file.read(len_bytes) | |
791 | ||
792 | ||
78169723 FD |
793 | class _LttngMetadataStreamSection: |
794 | def __init__(self, timestamp, data): | |
795 | self._timestamp = timestamp | |
796 | if data is None: | |
797 | self._data = bytes() | |
798 | else: | |
799 | self._data = data | |
800 | logging.info( | |
f5567ea8 | 801 | "Built metadata stream section: ts={}, data-len={}".format( |
78169723 FD |
802 | self._timestamp, len(self._data) |
803 | ) | |
804 | ) | |
805 | ||
806 | @property | |
807 | def timestamp(self): | |
808 | return self._timestamp | |
809 | ||
810 | @property | |
811 | def data(self): | |
812 | return self._data | |
813 | ||
814 | ||
584af91e PP |
815 | # An LTTng metadata stream. |
816 | class _LttngMetadataStream: | |
78169723 FD |
817 | def __init__(self, metadata_file_path, config_sections): |
818 | self._path = metadata_file_path | |
819 | self._sections = config_sections | |
820 | logging.info( | |
f5567ea8 | 821 | "Built metadata stream: path={}, section-len={}".format( |
78169723 FD |
822 | self._path, len(self._sections) |
823 | ) | |
824 | ) | |
584af91e PP |
825 | |
826 | @property | |
827 | def path(self): | |
828 | return self._path | |
829 | ||
830 | @property | |
78169723 FD |
831 | def sections(self): |
832 | return self._sections | |
584af91e | 833 | |
78169723 FD |
834 | |
835 | LttngMetadataConfigSection = namedtuple( | |
f5567ea8 | 836 | "LttngMetadataConfigSection", ["line", "timestamp", "is_empty"] |
78169723 FD |
837 | ) |
838 | ||
839 | ||
840 | def _parse_metadata_sections_config(config_sections): | |
841 | assert config_sections is not None | |
842 | config_metadata_sections = [] | |
843 | append_empty_section = False | |
844 | last_timestamp = 0 | |
845 | last_line = 0 | |
846 | ||
847 | for config_section in config_sections: | |
f5567ea8 | 848 | if config_section == "empty": |
78169723 FD |
849 | # Found a empty section marker. Actually append the section at the |
850 | # timestamp of the next concrete section. | |
851 | append_empty_section = True | |
852 | else: | |
853 | assert type(config_section) is dict | |
f5567ea8 FD |
854 | line = config_section.get("line") |
855 | ts = config_section.get("timestamp") | |
78169723 FD |
856 | |
857 | # Sections' timestamps and lines must both be increasing. | |
858 | assert ts > last_timestamp | |
859 | last_timestamp = ts | |
860 | assert line > last_line | |
861 | last_line = line | |
862 | ||
863 | if append_empty_section: | |
864 | config_metadata_sections.append( | |
865 | LttngMetadataConfigSection(line, ts, True) | |
866 | ) | |
867 | append_empty_section = False | |
868 | ||
869 | config_metadata_sections.append(LttngMetadataConfigSection(line, ts, False)) | |
870 | ||
871 | return config_metadata_sections | |
872 | ||
873 | ||
874 | def _split_metadata_sections(metadata_file_path, raw_config_sections): | |
875 | assert isinstance(raw_config_sections, collections.abc.Sequence) | |
876 | ||
877 | parsed_sections = _parse_metadata_sections_config(raw_config_sections) | |
878 | ||
879 | sections = [] | |
f5567ea8 | 880 | with open(metadata_file_path, "r") as metadata_file: |
78169723 FD |
881 | metadata_lines = [line for line in metadata_file] |
882 | ||
883 | config_metadata_sections_idx = 0 | |
884 | curr_metadata_section = bytearray() | |
885 | ||
886 | for idx, line_content in enumerate(metadata_lines): | |
887 | # Add one to the index to convert from the zero-indexing of the | |
888 | # enumerate() function to the one-indexing used by humans when | |
889 | # viewing a text file. | |
890 | curr_line_number = idx + 1 | |
891 | ||
892 | # If there are no more sections, simply append the line. | |
893 | if config_metadata_sections_idx + 1 >= len(parsed_sections): | |
f5567ea8 | 894 | curr_metadata_section += bytearray(line_content, "utf8") |
78169723 FD |
895 | continue |
896 | ||
897 | next_section_line_number = parsed_sections[ | |
898 | config_metadata_sections_idx + 1 | |
899 | ].line | |
900 | ||
901 | # If the next section begins at the current line, create a | |
902 | # section with the metadata we gathered so far. | |
903 | if curr_line_number >= next_section_line_number: | |
78169723 FD |
904 | # Flushing the metadata of the current section. |
905 | sections.append( | |
906 | _LttngMetadataStreamSection( | |
907 | parsed_sections[config_metadata_sections_idx].timestamp, | |
908 | bytes(curr_metadata_section), | |
909 | ) | |
910 | ) | |
911 | ||
912 | # Move to the next section. | |
913 | config_metadata_sections_idx += 1 | |
914 | ||
915 | # Clear old content and append current line for the next section. | |
916 | curr_metadata_section.clear() | |
f5567ea8 | 917 | curr_metadata_section += bytearray(line_content, "utf8") |
78169723 FD |
918 | |
919 | # Append any empty sections. | |
920 | while parsed_sections[config_metadata_sections_idx].is_empty: | |
921 | sections.append( | |
922 | _LttngMetadataStreamSection( | |
923 | parsed_sections[config_metadata_sections_idx].timestamp, None | |
924 | ) | |
925 | ) | |
926 | config_metadata_sections_idx += 1 | |
927 | else: | |
928 | # Append line_content to the current metadata section. | |
f5567ea8 | 929 | curr_metadata_section += bytearray(line_content, "utf8") |
78169723 FD |
930 | |
931 | # We iterated over all the lines of the metadata file. Close the current section. | |
932 | sections.append( | |
933 | _LttngMetadataStreamSection( | |
934 | parsed_sections[config_metadata_sections_idx].timestamp, | |
935 | bytes(curr_metadata_section), | |
936 | ) | |
937 | ) | |
938 | ||
939 | return sections | |
584af91e PP |
940 | |
941 | ||
942 | # An LTTng trace, a sequence of LTTng data streams. | |
943 | class LttngTrace(collections.abc.Sequence): | |
78169723 | 944 | def __init__(self, trace_dir, metadata_sections, beacons): |
584af91e PP |
945 | assert os.path.isdir(trace_dir) |
946 | self._path = trace_dir | |
78169723 | 947 | self._create_metadata_stream(trace_dir, metadata_sections) |
71f56e5f | 948 | self._create_data_streams(trace_dir, beacons) |
584af91e PP |
949 | logging.info('Built trace: path="{}"'.format(trace_dir)) |
950 | ||
71f56e5f | 951 | def _create_data_streams(self, trace_dir, beacons): |
584af91e PP |
952 | data_stream_paths = [] |
953 | ||
954 | for filename in os.listdir(trace_dir): | |
955 | path = os.path.join(trace_dir, filename) | |
956 | ||
957 | if not os.path.isfile(path): | |
958 | continue | |
959 | ||
f5567ea8 | 960 | if filename.startswith("."): |
584af91e PP |
961 | continue |
962 | ||
f5567ea8 | 963 | if filename == "metadata": |
584af91e PP |
964 | continue |
965 | ||
966 | data_stream_paths.append(path) | |
967 | ||
968 | data_stream_paths.sort() | |
969 | self._data_streams = [] | |
970 | ||
971 | for data_stream_path in data_stream_paths: | |
71f56e5f JG |
972 | stream_name = os.path.basename(data_stream_path) |
973 | this_stream_beacons = None | |
974 | ||
975 | if beacons is not None and stream_name in beacons: | |
976 | this_stream_beacons = beacons[stream_name] | |
977 | ||
978 | self._data_streams.append( | |
979 | _LttngDataStream(data_stream_path, this_stream_beacons) | |
980 | ) | |
584af91e | 981 | |
78169723 | 982 | def _create_metadata_stream(self, trace_dir, config_metadata_sections): |
f5567ea8 | 983 | metadata_path = os.path.join(trace_dir, "metadata") |
78169723 FD |
984 | metadata_sections = [] |
985 | ||
986 | if config_metadata_sections is None: | |
f5567ea8 | 987 | with open(metadata_path, "rb") as metadata_file: |
78169723 FD |
988 | metadata_sections.append( |
989 | _LttngMetadataStreamSection(0, metadata_file.read()) | |
990 | ) | |
991 | else: | |
992 | metadata_sections = _split_metadata_sections( | |
993 | metadata_path, config_metadata_sections | |
994 | ) | |
995 | ||
996 | self._metadata_stream = _LttngMetadataStream(metadata_path, metadata_sections) | |
997 | ||
584af91e PP |
998 | @property |
999 | def path(self): | |
1000 | return self._path | |
1001 | ||
1002 | @property | |
1003 | def metadata_stream(self): | |
1004 | return self._metadata_stream | |
1005 | ||
1006 | def __getitem__(self, index): | |
1007 | return self._data_streams[index] | |
1008 | ||
1009 | def __len__(self): | |
1010 | return len(self._data_streams) | |
1011 | ||
1012 | ||
1013 | # The state of a single data stream. | |
1014 | class _LttngLiveViewerSessionDataStreamState: | |
78169723 | 1015 | def __init__(self, ts_state, info, data_stream, metadata_stream_id): |
584af91e PP |
1016 | self._ts_state = ts_state |
1017 | self._info = info | |
1018 | self._data_stream = data_stream | |
78169723 | 1019 | self._metadata_stream_id = metadata_stream_id |
584af91e PP |
1020 | self._cur_index_entry_index = 0 |
1021 | fmt = 'Built data stream state: id={}, ts-id={}, ts-name="{}", path="{}"' | |
1022 | logging.info( | |
1023 | fmt.format( | |
1024 | info.id, | |
1025 | ts_state.tracing_session_descriptor.info.tracing_session_id, | |
1026 | ts_state.tracing_session_descriptor.info.name, | |
1027 | data_stream.path, | |
1028 | ) | |
1029 | ) | |
1030 | ||
1031 | @property | |
1032 | def tracing_session_state(self): | |
1033 | return self._ts_state | |
1034 | ||
1035 | @property | |
1036 | def info(self): | |
1037 | return self._info | |
1038 | ||
1039 | @property | |
1040 | def data_stream(self): | |
1041 | return self._data_stream | |
1042 | ||
1043 | @property | |
1044 | def cur_index_entry(self): | |
1045 | if self._cur_index_entry_index == len(self._data_stream.index): | |
1046 | return | |
1047 | ||
1048 | return self._data_stream.index[self._cur_index_entry_index] | |
1049 | ||
1050 | def goto_next_index_entry(self): | |
1051 | self._cur_index_entry_index += 1 | |
1052 | ||
1053 | ||
1054 | # The state of a single metadata stream. | |
1055 | class _LttngLiveViewerSessionMetadataStreamState: | |
1056 | def __init__(self, ts_state, info, metadata_stream): | |
1057 | self._ts_state = ts_state | |
1058 | self._info = info | |
1059 | self._metadata_stream = metadata_stream | |
78169723 FD |
1060 | self._cur_metadata_stream_section_index = 0 |
1061 | if len(metadata_stream.sections) > 1: | |
1062 | self._next_metadata_stream_section_timestamp = metadata_stream.sections[ | |
1063 | 1 | |
1064 | ].timestamp | |
1065 | else: | |
1066 | self._next_metadata_stream_section_timestamp = None | |
1067 | ||
584af91e PP |
1068 | self._is_sent = False |
1069 | fmt = 'Built metadata stream state: id={}, ts-id={}, ts-name="{}", path="{}"' | |
1070 | logging.info( | |
1071 | fmt.format( | |
1072 | info.id, | |
1073 | ts_state.tracing_session_descriptor.info.tracing_session_id, | |
1074 | ts_state.tracing_session_descriptor.info.name, | |
1075 | metadata_stream.path, | |
1076 | ) | |
1077 | ) | |
1078 | ||
1079 | @property | |
1080 | def trace_session_state(self): | |
1081 | return self._trace_session_state | |
1082 | ||
1083 | @property | |
1084 | def info(self): | |
1085 | return self._info | |
1086 | ||
1087 | @property | |
1088 | def metadata_stream(self): | |
1089 | return self._metadata_stream | |
1090 | ||
1091 | @property | |
1092 | def is_sent(self): | |
1093 | return self._is_sent | |
1094 | ||
1095 | @is_sent.setter | |
1096 | def is_sent(self, value): | |
1097 | self._is_sent = value | |
1098 | ||
78169723 FD |
1099 | @property |
1100 | def cur_section(self): | |
1101 | fmt = "Get current metadata section: section-idx={}" | |
1102 | logging.info(fmt.format(self._cur_metadata_stream_section_index)) | |
1103 | if self._cur_metadata_stream_section_index == len( | |
1104 | self._metadata_stream.sections | |
1105 | ): | |
1106 | return | |
1107 | ||
1108 | return self._metadata_stream.sections[self._cur_metadata_stream_section_index] | |
1109 | ||
1110 | def goto_next_section(self): | |
1111 | self._cur_metadata_stream_section_index += 1 | |
1112 | if self.cur_section: | |
1113 | self._next_metadata_stream_section_timestamp = self.cur_section.timestamp | |
1114 | else: | |
1115 | self._next_metadata_stream_section_timestamp = None | |
1116 | ||
1117 | @property | |
1118 | def next_section_timestamp(self): | |
1119 | return self._next_metadata_stream_section_timestamp | |
1120 | ||
584af91e | 1121 | |
ee1171e5 SM |
1122 | # A tracing session descriptor. |
1123 | # | |
1124 | # In the constructor, `traces` is a list of LTTng traces (`LttngTrace` | |
1125 | # objects). | |
1126 | class LttngTracingSessionDescriptor: | |
1127 | def __init__( | |
1128 | self, name, tracing_session_id, hostname, live_timer_freq, client_count, traces | |
1129 | ): | |
1130 | for trace in traces: | |
1131 | if name not in trace.path: | |
1132 | fmt = "Tracing session name must be part of every trace path (`{}` not found in `{}`)" | |
1133 | raise ValueError(fmt.format(name, trace.path)) | |
1134 | ||
1135 | self._traces = traces | |
1136 | stream_count = sum([len(t) + 1 for t in traces]) | |
1137 | self._info = _LttngLiveViewerTracingSessionInfo( | |
1138 | tracing_session_id, | |
1139 | live_timer_freq, | |
1140 | client_count, | |
1141 | stream_count, | |
1142 | hostname, | |
1143 | name, | |
1144 | ) | |
1145 | ||
1146 | @property | |
1147 | def traces(self): | |
1148 | return self._traces | |
1149 | ||
1150 | @property | |
1151 | def info(self): | |
1152 | return self._info | |
1153 | ||
1154 | ||
584af91e PP |
1155 | # The state of a tracing session. |
1156 | class _LttngLiveViewerSessionTracingSessionState: | |
1157 | def __init__(self, tc_descr, base_stream_id): | |
1158 | self._tc_descr = tc_descr | |
1159 | self._stream_infos = [] | |
1160 | self._ds_states = {} | |
1161 | self._ms_states = {} | |
1162 | stream_id = base_stream_id | |
1163 | ||
1164 | for trace in tc_descr.traces: | |
1165 | trace_id = stream_id * 1000 | |
1166 | ||
78169723 FD |
1167 | # Metadata stream -> stream info and metadata stream state |
1168 | info = _LttngLiveViewerStreamInfo( | |
f5567ea8 | 1169 | stream_id, trace_id, True, trace.metadata_stream.path, "metadata" |
78169723 FD |
1170 | ) |
1171 | self._stream_infos.append(info) | |
1172 | self._ms_states[stream_id] = _LttngLiveViewerSessionMetadataStreamState( | |
1173 | self, info, trace.metadata_stream | |
1174 | ) | |
1175 | metadata_stream_id = stream_id | |
1176 | stream_id += 1 | |
1177 | ||
584af91e PP |
1178 | # Data streams -> stream infos and data stream states |
1179 | for data_stream in trace: | |
1180 | info = _LttngLiveViewerStreamInfo( | |
1181 | stream_id, | |
1182 | trace_id, | |
1183 | False, | |
1184 | data_stream.path, | |
1185 | data_stream.channel_name, | |
1186 | ) | |
1187 | self._stream_infos.append(info) | |
1188 | self._ds_states[stream_id] = _LttngLiveViewerSessionDataStreamState( | |
78169723 | 1189 | self, info, data_stream, metadata_stream_id |
584af91e PP |
1190 | ) |
1191 | stream_id += 1 | |
1192 | ||
584af91e PP |
1193 | self._is_attached = False |
1194 | fmt = 'Built tracing session state: id={}, name="{}"' | |
1195 | logging.info(fmt.format(tc_descr.info.tracing_session_id, tc_descr.info.name)) | |
1196 | ||
1197 | @property | |
1198 | def tracing_session_descriptor(self): | |
1199 | return self._tc_descr | |
1200 | ||
1201 | @property | |
1202 | def data_stream_states(self): | |
1203 | return self._ds_states | |
1204 | ||
1205 | @property | |
1206 | def metadata_stream_states(self): | |
1207 | return self._ms_states | |
1208 | ||
1209 | @property | |
1210 | def stream_infos(self): | |
1211 | return self._stream_infos | |
1212 | ||
1213 | @property | |
1214 | def has_new_metadata(self): | |
1215 | return any([not ms.is_sent for ms in self._ms_states.values()]) | |
1216 | ||
1217 | @property | |
1218 | def is_attached(self): | |
1219 | return self._is_attached | |
1220 | ||
1221 | @is_attached.setter | |
1222 | def is_attached(self, value): | |
1223 | self._is_attached = value | |
1224 | ||
1225 | ||
78169723 FD |
1226 | def needs_new_metadata_section(metadata_stream_state, latest_timestamp): |
1227 | if metadata_stream_state.next_section_timestamp is None: | |
1228 | return False | |
1229 | ||
1230 | if latest_timestamp >= metadata_stream_state.next_section_timestamp: | |
1231 | return True | |
1232 | else: | |
1233 | return False | |
1234 | ||
1235 | ||
584af91e PP |
1236 | # An LTTng live viewer session manages a view on tracing sessions |
1237 | # and replies to commands accordingly. | |
1238 | class _LttngLiveViewerSession: | |
1239 | def __init__( | |
1240 | self, | |
1241 | viewer_session_id, | |
1242 | tracing_session_descriptors, | |
1243 | max_query_data_response_size, | |
1244 | ): | |
1245 | self._viewer_session_id = viewer_session_id | |
1246 | self._ts_states = {} | |
1247 | self._stream_states = {} | |
1248 | self._max_query_data_response_size = max_query_data_response_size | |
1249 | total_stream_infos = 0 | |
1250 | ||
1251 | for ts_descr in tracing_session_descriptors: | |
1252 | ts_state = _LttngLiveViewerSessionTracingSessionState( | |
1253 | ts_descr, total_stream_infos | |
1254 | ) | |
1255 | ts_id = ts_state.tracing_session_descriptor.info.tracing_session_id | |
1256 | self._ts_states[ts_id] = ts_state | |
1257 | total_stream_infos += len(ts_state.stream_infos) | |
1258 | ||
1259 | # Update session's stream states to have the new states | |
1260 | self._stream_states.update(ts_state.data_stream_states) | |
1261 | self._stream_states.update(ts_state.metadata_stream_states) | |
1262 | ||
1263 | self._command_handlers = { | |
1264 | _LttngLiveViewerAttachToTracingSessionCommand: self._handle_attach_to_tracing_session_command, | |
1265 | _LttngLiveViewerCreateViewerSessionCommand: self._handle_create_viewer_session_command, | |
1266 | _LttngLiveViewerDetachFromTracingSessionCommand: self._handle_detach_from_tracing_session_command, | |
1267 | _LttngLiveViewerGetDataStreamPacketDataCommand: self._handle_get_data_stream_packet_data_command, | |
1268 | _LttngLiveViewerGetMetadataStreamDataCommand: self._handle_get_metadata_stream_data_command, | |
1269 | _LttngLiveViewerGetNewStreamInfosCommand: self._handle_get_new_stream_infos_command, | |
1270 | _LttngLiveViewerGetNextDataStreamIndexEntryCommand: self._handle_get_next_data_stream_index_entry_command, | |
1271 | _LttngLiveViewerGetTracingSessionInfosCommand: self._handle_get_tracing_session_infos_command, | |
1272 | } | |
1273 | ||
1274 | @property | |
1275 | def viewer_session_id(self): | |
1276 | return self._viewer_session_id | |
1277 | ||
1278 | def _get_tracing_session_state(self, tracing_session_id): | |
1279 | if tracing_session_id not in self._ts_states: | |
1280 | raise UnexpectedInput( | |
f5567ea8 | 1281 | "Unknown tracing session ID {}".format(tracing_session_id) |
584af91e PP |
1282 | ) |
1283 | ||
1284 | return self._ts_states[tracing_session_id] | |
1285 | ||
1286 | def _get_stream_state(self, stream_id): | |
1287 | if stream_id not in self._stream_states: | |
f5567ea8 | 1288 | UnexpectedInput("Unknown stream ID {}".format(stream_id)) |
584af91e PP |
1289 | |
1290 | return self._stream_states[stream_id] | |
1291 | ||
1292 | def handle_command(self, cmd): | |
1293 | logging.info( | |
f5567ea8 | 1294 | "Handling command in viewer session: cmd-cls-name={}".format( |
584af91e PP |
1295 | cmd.__class__.__name__ |
1296 | ) | |
1297 | ) | |
1298 | cmd_type = type(cmd) | |
1299 | ||
1300 | if cmd_type not in self._command_handlers: | |
1301 | raise UnexpectedInput( | |
f5567ea8 | 1302 | "Unexpected command: cmd-cls-name={}".format(cmd.__class__.__name__) |
584af91e PP |
1303 | ) |
1304 | ||
1305 | return self._command_handlers[cmd_type](cmd) | |
1306 | ||
1307 | def _handle_attach_to_tracing_session_command(self, cmd): | |
1308 | fmt = 'Handling "attach to tracing session" command: ts-id={}, offset={}, seek-type={}' | |
1309 | logging.info(fmt.format(cmd.tracing_session_id, cmd.offset, cmd.seek_type)) | |
1310 | ts_state = self._get_tracing_session_state(cmd.tracing_session_id) | |
1311 | info = ts_state.tracing_session_descriptor.info | |
1312 | ||
1313 | if ts_state.is_attached: | |
1314 | raise UnexpectedInput( | |
f5567ea8 | 1315 | "Cannot attach to tracing session `{}`: viewer is already attached".format( |
584af91e PP |
1316 | info.name |
1317 | ) | |
1318 | ) | |
1319 | ||
1320 | ts_state.is_attached = True | |
1321 | status = _LttngLiveViewerAttachToTracingSessionReply.Status.OK | |
1322 | return _LttngLiveViewerAttachToTracingSessionReply( | |
1323 | status, ts_state.stream_infos | |
1324 | ) | |
1325 | ||
1326 | def _handle_detach_from_tracing_session_command(self, cmd): | |
1327 | fmt = 'Handling "detach from tracing session" command: ts-id={}' | |
1328 | logging.info(fmt.format(cmd.tracing_session_id)) | |
1329 | ts_state = self._get_tracing_session_state(cmd.tracing_session_id) | |
1330 | info = ts_state.tracing_session_descriptor.info | |
1331 | ||
1332 | if not ts_state.is_attached: | |
1333 | raise UnexpectedInput( | |
f5567ea8 | 1334 | "Cannot detach to tracing session `{}`: viewer is not attached".format( |
584af91e PP |
1335 | info.name |
1336 | ) | |
1337 | ) | |
1338 | ||
1339 | ts_state.is_attached = False | |
1340 | status = _LttngLiveViewerDetachFromTracingSessionReply.Status.OK | |
1341 | return _LttngLiveViewerDetachFromTracingSessionReply(status) | |
1342 | ||
1343 | def _handle_get_next_data_stream_index_entry_command(self, cmd): | |
1344 | fmt = 'Handling "get next data stream index entry" command: stream-id={}' | |
1345 | logging.info(fmt.format(cmd.stream_id)) | |
1346 | stream_state = self._get_stream_state(cmd.stream_id) | |
78169723 | 1347 | metadata_stream_state = self._get_stream_state(stream_state._metadata_stream_id) |
584af91e PP |
1348 | |
1349 | if type(stream_state) is not _LttngLiveViewerSessionDataStreamState: | |
1350 | raise UnexpectedInput( | |
f5567ea8 | 1351 | "Stream with ID {} is not a data stream".format(cmd.stream_id) |
584af91e PP |
1352 | ) |
1353 | ||
1354 | if stream_state.cur_index_entry is None: | |
1355 | # The viewer is done reading this stream | |
1356 | status = _LttngLiveViewerGetNextDataStreamIndexEntryReply.Status.HUP | |
1357 | ||
1358 | # Dummy data stream index entry to use with the `HUP` status | |
1359 | # (the reply needs one, but the viewer ignores it) | |
1360 | index_entry = _LttngDataStreamIndexEntry(0, 0, 0, 0, 0, 0, 0) | |
1361 | ||
1362 | return _LttngLiveViewerGetNextDataStreamIndexEntryReply( | |
1363 | status, index_entry, False, False | |
1364 | ) | |
1365 | ||
78169723 FD |
1366 | timestamp_begin = _get_entry_timestamp_begin(stream_state.cur_index_entry) |
1367 | ||
1368 | if needs_new_metadata_section(metadata_stream_state, timestamp_begin): | |
1369 | metadata_stream_state.is_sent = False | |
1370 | metadata_stream_state.goto_next_section() | |
1371 | ||
584af91e PP |
1372 | # The viewer only checks the `has_new_metadata` flag if the |
1373 | # reply's status is `OK`, so we need to provide an index here | |
1374 | has_new_metadata = stream_state.tracing_session_state.has_new_metadata | |
71f56e5f JG |
1375 | if type(stream_state.cur_index_entry) is _LttngDataStreamIndexEntry: |
1376 | status = _LttngLiveViewerGetNextDataStreamIndexEntryReply.Status.OK | |
1377 | else: | |
1378 | assert type(stream_state.cur_index_entry) is _LttngDataStreamBeaconEntry | |
1379 | status = _LttngLiveViewerGetNextDataStreamIndexEntryReply.Status.INACTIVE | |
1380 | ||
584af91e PP |
1381 | reply = _LttngLiveViewerGetNextDataStreamIndexEntryReply( |
1382 | status, stream_state.cur_index_entry, has_new_metadata, False | |
1383 | ) | |
1384 | stream_state.goto_next_index_entry() | |
1385 | return reply | |
1386 | ||
1387 | def _handle_get_data_stream_packet_data_command(self, cmd): | |
1388 | fmt = 'Handling "get data stream packet data" command: stream-id={}, offset={}, req-length={}' | |
1389 | logging.info(fmt.format(cmd.stream_id, cmd.offset, cmd.req_length)) | |
1390 | stream_state = self._get_stream_state(cmd.stream_id) | |
1391 | data_response_length = cmd.req_length | |
1392 | ||
1393 | if type(stream_state) is not _LttngLiveViewerSessionDataStreamState: | |
1394 | raise UnexpectedInput( | |
f5567ea8 | 1395 | "Stream with ID {} is not a data stream".format(cmd.stream_id) |
584af91e PP |
1396 | ) |
1397 | ||
1398 | if stream_state.tracing_session_state.has_new_metadata: | |
1399 | status = _LttngLiveViewerGetDataStreamPacketDataReply.Status.ERROR | |
1400 | return _LttngLiveViewerGetDataStreamPacketDataReply( | |
1401 | status, bytes(), True, False | |
1402 | ) | |
1403 | ||
1404 | if self._max_query_data_response_size: | |
1405 | # Enforce a server side limit on the query requested length. | |
1406 | # To ensure that the transaction terminate take the minimum of both | |
1407 | # value. | |
1408 | data_response_length = min( | |
1409 | cmd.req_length, self._max_query_data_response_size | |
1410 | ) | |
1411 | fmt = 'Limiting "get data stream packet data" command: req-length={} actual response size={}' | |
1412 | logging.info(fmt.format(cmd.req_length, data_response_length)) | |
1413 | ||
1414 | data = stream_state.data_stream.get_data(cmd.offset, data_response_length) | |
1415 | status = _LttngLiveViewerGetDataStreamPacketDataReply.Status.OK | |
1416 | return _LttngLiveViewerGetDataStreamPacketDataReply(status, data, False, False) | |
1417 | ||
1418 | def _handle_get_metadata_stream_data_command(self, cmd): | |
1419 | fmt = 'Handling "get metadata stream data" command: stream-id={}' | |
1420 | logging.info(fmt.format(cmd.stream_id)) | |
78169723 | 1421 | metadata_stream_state = self._get_stream_state(cmd.stream_id) |
584af91e | 1422 | |
78169723 FD |
1423 | if ( |
1424 | type(metadata_stream_state) | |
1425 | is not _LttngLiveViewerSessionMetadataStreamState | |
1426 | ): | |
584af91e | 1427 | raise UnexpectedInput( |
f5567ea8 | 1428 | "Stream with ID {} is not a metadata stream".format(cmd.stream_id) |
584af91e PP |
1429 | ) |
1430 | ||
78169723 | 1431 | if metadata_stream_state.is_sent: |
584af91e PP |
1432 | status = _LttngLiveViewerGetMetadataStreamDataContentReply.Status.NO_NEW |
1433 | return _LttngLiveViewerGetMetadataStreamDataContentReply(status, bytes()) | |
1434 | ||
78169723 | 1435 | metadata_stream_state.is_sent = True |
584af91e | 1436 | status = _LttngLiveViewerGetMetadataStreamDataContentReply.Status.OK |
78169723 FD |
1437 | metadata_section = metadata_stream_state.cur_section |
1438 | ||
1439 | # If we are sending an empty section, ready the next one right away. | |
1440 | if len(metadata_section.data) == 0: | |
1441 | metadata_stream_state.is_sent = False | |
1442 | metadata_stream_state.goto_next_section() | |
1443 | ||
1444 | fmt = 'Replying to "get metadata stream data" command: metadata-size={}' | |
1445 | logging.info(fmt.format(len(metadata_section.data))) | |
584af91e | 1446 | return _LttngLiveViewerGetMetadataStreamDataContentReply( |
78169723 | 1447 | status, metadata_section.data |
584af91e PP |
1448 | ) |
1449 | ||
1450 | def _handle_get_new_stream_infos_command(self, cmd): | |
1451 | fmt = 'Handling "get new stream infos" command: ts-id={}' | |
1452 | logging.info(fmt.format(cmd.tracing_session_id)) | |
1453 | ||
1454 | # As of this version, all the tracing session's stream infos are | |
1455 | # always given to the viewer when sending the "attach to tracing | |
1456 | # session" reply, so there's nothing new here. Return the `HUP` | |
1457 | # status as, if we're handling this command, the viewer consumed | |
1458 | # all the existing data streams. | |
1459 | status = _LttngLiveViewerGetNewStreamInfosReply.Status.HUP | |
1460 | return _LttngLiveViewerGetNewStreamInfosReply(status, []) | |
1461 | ||
1462 | def _handle_get_tracing_session_infos_command(self, cmd): | |
1463 | logging.info('Handling "get tracing session infos" command.') | |
1464 | infos = [ | |
1465 | tss.tracing_session_descriptor.info for tss in self._ts_states.values() | |
1466 | ] | |
1467 | infos.sort(key=lambda info: info.name) | |
1468 | return _LttngLiveViewerGetTracingSessionInfosReply(infos) | |
1469 | ||
1470 | def _handle_create_viewer_session_command(self, cmd): | |
1471 | logging.info('Handling "create viewer session" command.') | |
1472 | status = _LttngLiveViewerCreateViewerSessionReply.Status.OK | |
1473 | ||
1474 | # This does nothing here. In the LTTng relay daemon, it | |
1475 | # allocates the viewer session's state. | |
1476 | return _LttngLiveViewerCreateViewerSessionReply(status) | |
1477 | ||
1478 | ||
1479 | # An LTTng live TCP server. | |
1480 | # | |
e51141d3 SM |
1481 | # On creation, it binds to `localhost` on the TCP port `port` if not `None`, or |
1482 | # on an OS-assigned TCP port otherwise. It writes the decimal TCP port number | |
1483 | # to a temporary port file. It renames the temporary port file to | |
1484 | # `port_filename`. | |
584af91e PP |
1485 | # |
1486 | # `tracing_session_descriptors` is a list of tracing session descriptors | |
1487 | # (`LttngTracingSessionDescriptor`) to serve. | |
1488 | # | |
1489 | # This server accepts a single viewer (client). | |
1490 | # | |
1491 | # When the viewer closes the connection, the server's constructor | |
1492 | # returns. | |
1493 | class LttngLiveServer: | |
1494 | def __init__( | |
e51141d3 SM |
1495 | self, |
1496 | port, | |
1497 | port_filename, | |
1498 | tracing_session_descriptors, | |
1499 | max_query_data_response_size, | |
584af91e | 1500 | ): |
f5567ea8 | 1501 | logging.info("Server configuration:") |
584af91e | 1502 | |
f5567ea8 | 1503 | logging.info(" Port file name: `{}`".format(port_filename)) |
584af91e PP |
1504 | |
1505 | if max_query_data_response_size is not None: | |
1506 | logging.info( | |
f5567ea8 | 1507 | " Maximum response data query size: `{}`".format( |
584af91e PP |
1508 | max_query_data_response_size |
1509 | ) | |
1510 | ) | |
1511 | ||
1512 | for ts_descr in tracing_session_descriptors: | |
1513 | info = ts_descr.info | |
1514 | fmt = ' TS descriptor: name="{}", id={}, hostname="{}", live-timer-freq={}, client-count={}, stream-count={}:' | |
1515 | logging.info( | |
1516 | fmt.format( | |
1517 | info.name, | |
1518 | info.tracing_session_id, | |
1519 | info.hostname, | |
1520 | info.live_timer_freq, | |
1521 | info.client_count, | |
1522 | info.stream_count, | |
1523 | ) | |
1524 | ) | |
1525 | ||
1526 | for trace in ts_descr.traces: | |
1527 | logging.info(' Trace: path="{}"'.format(trace.path)) | |
1528 | ||
1529 | self._ts_descriptors = tracing_session_descriptors | |
1530 | self._max_query_data_response_size = max_query_data_response_size | |
1531 | self._sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
1532 | self._codec = _LttngLiveViewerProtocolCodec() | |
1533 | ||
1534 | # Port 0: OS assigns an unused port | |
e51141d3 | 1535 | serv_addr = ("localhost", port if port is not None else 0) |
584af91e PP |
1536 | self._sock.bind(serv_addr) |
1537 | self._write_port_to_file(port_filename) | |
1538 | ||
1539 | try: | |
1540 | self._listen() | |
1541 | finally: | |
1542 | self._sock.close() | |
f5567ea8 | 1543 | logging.info("Closed connection and socket.") |
584af91e PP |
1544 | |
1545 | @property | |
1546 | def _server_port(self): | |
1547 | return self._sock.getsockname()[1] | |
1548 | ||
1549 | def _recv_command(self): | |
1550 | data = bytes() | |
1551 | ||
1552 | while True: | |
f5567ea8 | 1553 | logging.info("Waiting for viewer command.") |
584af91e PP |
1554 | buf = self._conn.recv(128) |
1555 | ||
1556 | if not buf: | |
f5567ea8 | 1557 | logging.info("Client closed connection.") |
584af91e PP |
1558 | |
1559 | if data: | |
1560 | raise UnexpectedInput( | |
f5567ea8 | 1561 | "Client closed connection after having sent {} command bytes.".format( |
584af91e PP |
1562 | len(data) |
1563 | ) | |
1564 | ) | |
1565 | ||
1566 | return | |
1567 | ||
f5567ea8 | 1568 | logging.info("Received data from viewer: length={}".format(len(buf))) |
584af91e PP |
1569 | |
1570 | data += buf | |
1571 | ||
1572 | try: | |
1573 | cmd = self._codec.decode(data) | |
1574 | except struct.error as exc: | |
f5567ea8 | 1575 | raise UnexpectedInput("Malformed command: {}".format(exc)) from exc |
584af91e PP |
1576 | |
1577 | if cmd is not None: | |
1578 | logging.info( | |
f5567ea8 | 1579 | "Received command from viewer: cmd-cls-name={}".format( |
584af91e PP |
1580 | cmd.__class__.__name__ |
1581 | ) | |
1582 | ) | |
1583 | return cmd | |
1584 | ||
1585 | def _send_reply(self, reply): | |
1586 | data = self._codec.encode(reply) | |
1587 | logging.info( | |
f5567ea8 | 1588 | "Sending reply to viewer: reply-cls-name={}, length={}".format( |
584af91e PP |
1589 | reply.__class__.__name__, len(data) |
1590 | ) | |
1591 | ) | |
1592 | self._conn.sendall(data) | |
1593 | ||
1594 | def _handle_connection(self): | |
1595 | # First command must be "connect" | |
1596 | cmd = self._recv_command() | |
1597 | ||
1598 | if type(cmd) is not _LttngLiveViewerConnectCommand: | |
1599 | raise UnexpectedInput( | |
1600 | 'First command is not "connect": cmd-cls-name={}'.format( | |
1601 | cmd.__class__.__name__ | |
1602 | ) | |
1603 | ) | |
1604 | ||
1605 | # Create viewer session (arbitrary ID 23) | |
1606 | logging.info( | |
f5567ea8 | 1607 | "LTTng live viewer connected: version={}.{}".format(cmd.major, cmd.minor) |
584af91e PP |
1608 | ) |
1609 | viewer_session = _LttngLiveViewerSession( | |
1610 | 23, self._ts_descriptors, self._max_query_data_response_size | |
1611 | ) | |
1612 | ||
1613 | # Send "connect" reply | |
1614 | self._send_reply( | |
1615 | _LttngLiveViewerConnectReply(viewer_session.viewer_session_id, 2, 10) | |
1616 | ) | |
1617 | ||
1618 | # Make the viewer session handle the remaining commands | |
1619 | while True: | |
1620 | cmd = self._recv_command() | |
1621 | ||
1622 | if cmd is None: | |
1623 | # Connection closed (at an expected location within the | |
1624 | # conversation) | |
1625 | return | |
1626 | ||
1627 | self._send_reply(viewer_session.handle_command(cmd)) | |
1628 | ||
1629 | def _listen(self): | |
f5567ea8 | 1630 | logging.info("Listening: port={}".format(self._server_port)) |
1726ac08 JR |
1631 | # Backlog must be present for Python version < 3.5. |
1632 | # 128 is an arbitrary number since we expect only 1 connection anyway. | |
1633 | self._sock.listen(128) | |
584af91e PP |
1634 | self._conn, viewer_addr = self._sock.accept() |
1635 | logging.info( | |
f5567ea8 | 1636 | "Accepted viewer: addr={}:{}".format(viewer_addr[0], viewer_addr[1]) |
584af91e PP |
1637 | ) |
1638 | ||
1639 | try: | |
1640 | self._handle_connection() | |
1641 | finally: | |
1642 | self._conn.close() | |
1643 | ||
1644 | def _write_port_to_file(self, port_filename): | |
1645 | # Write the port number to a temporary file. | |
f5567ea8 FD |
1646 | with tempfile.NamedTemporaryFile(mode="w", delete=False) as tmp_port_file: |
1647 | print(self._server_port, end="", file=tmp_port_file) | |
584af91e PP |
1648 | |
1649 | # Rename temporary file to real file | |
9c878ece | 1650 | os.replace(tmp_port_file.name, port_filename) |
584af91e PP |
1651 | logging.info( |
1652 | 'Renamed port file: src-path="{}", dst-path="{}"'.format( | |
1653 | tmp_port_file.name, port_filename | |
1654 | ) | |
1655 | ) | |
1656 | ||
1657 | ||
2b763e29 JG |
1658 | def _session_descriptors_from_path(sessions_filename, trace_path_prefix): |
1659 | # File format is: | |
1660 | # | |
1661 | # [ | |
1662 | # { | |
1663 | # "name": "my-session", | |
1664 | # "id": 17, | |
1665 | # "hostname": "myhost", | |
1666 | # "live-timer-freq": 1000000, | |
1667 | # "client-count": 23, | |
1668 | # "traces": [ | |
1669 | # { | |
1670 | # "path": "lol" | |
1671 | # }, | |
1672 | # { | |
71f56e5f JG |
1673 | # "path": "meow/mix", |
1674 | # "beacons": { | |
1675 | # "my_stream": [ 5235787, 728375283 ] | |
78169723 FD |
1676 | # }, |
1677 | # "metadata-sections": [ | |
1678 | # { | |
1679 | # "line": 1, | |
1680 | # "timestamp": 0 | |
1681 | # } | |
1682 | # ] | |
2b763e29 JG |
1683 | # } |
1684 | # ] | |
1685 | # } | |
1686 | # ] | |
f5567ea8 | 1687 | with open(sessions_filename, "r") as sessions_file: |
2b763e29 JG |
1688 | params = json.load(sessions_file) |
1689 | ||
1690 | sessions = [] | |
1691 | ||
1692 | for session in params: | |
f5567ea8 FD |
1693 | name = session["name"] |
1694 | tracing_session_id = session["id"] | |
1695 | hostname = session["hostname"] | |
1696 | live_timer_freq = session["live-timer-freq"] | |
1697 | client_count = session["client-count"] | |
2b763e29 JG |
1698 | traces = [] |
1699 | ||
f5567ea8 FD |
1700 | for trace in session["traces"]: |
1701 | metadata_sections = trace.get("metadata-sections") | |
1702 | beacons = trace.get("beacons") | |
1703 | path = trace["path"] | |
2b763e29 JG |
1704 | |
1705 | if not os.path.isabs(path): | |
1706 | path = os.path.join(trace_path_prefix, path) | |
1707 | ||
78169723 | 1708 | traces.append(LttngTrace(path, metadata_sections, beacons)) |
2b763e29 JG |
1709 | |
1710 | sessions.append( | |
1711 | LttngTracingSessionDescriptor( | |
1712 | name, | |
1713 | tracing_session_id, | |
1714 | hostname, | |
1715 | live_timer_freq, | |
1716 | client_count, | |
1717 | traces, | |
1718 | ) | |
1719 | ) | |
1720 | ||
1721 | return sessions | |
584af91e PP |
1722 | |
1723 | ||
1724 | def _loglevel_parser(string): | |
f5567ea8 | 1725 | loglevels = {"info": logging.INFO, "warning": logging.WARNING} |
584af91e PP |
1726 | if string not in loglevels: |
1727 | msg = "{} is not a valid loglevel".format(string) | |
1728 | raise argparse.ArgumentTypeError(msg) | |
1729 | return loglevels[string] | |
1730 | ||
1731 | ||
f5567ea8 FD |
1732 | if __name__ == "__main__": |
1733 | logging.basicConfig(format="# %(asctime)-25s%(message)s") | |
584af91e | 1734 | parser = argparse.ArgumentParser( |
f5567ea8 | 1735 | description="LTTng-live protocol mocker", add_help=False |
584af91e PP |
1736 | ) |
1737 | parser.add_argument( | |
f5567ea8 FD |
1738 | "--log-level", |
1739 | default="warning", | |
1740 | choices=["info", "warning"], | |
1741 | help="The loglevel to be used.", | |
584af91e PP |
1742 | ) |
1743 | ||
1744 | loglevel_namespace, remaining_args = parser.parse_known_args() | |
1745 | logging.getLogger().setLevel(_loglevel_parser(loglevel_namespace.log_level)) | |
1746 | ||
e51141d3 SM |
1747 | parser.add_argument( |
1748 | "--port", | |
1749 | help="The port to bind to. If missing, use an OS-assigned port..", | |
1750 | type=int, | |
1751 | ) | |
584af91e | 1752 | parser.add_argument( |
f5567ea8 FD |
1753 | "--port-filename", |
1754 | help="The final port file. This file is present when the server is ready to receive connection.", | |
584af91e PP |
1755 | required=True, |
1756 | ) | |
1757 | parser.add_argument( | |
f5567ea8 | 1758 | "--max-query-data-response-size", |
584af91e | 1759 | type=int, |
f5567ea8 | 1760 | help="The maximum size of control data response in bytes", |
584af91e PP |
1761 | ) |
1762 | parser.add_argument( | |
f5567ea8 | 1763 | "--trace-path-prefix", |
2b763e29 | 1764 | type=str, |
f5567ea8 | 1765 | help="Prefix to prepend to the trace paths of session configurations", |
2b763e29 JG |
1766 | ) |
1767 | parser.add_argument( | |
f5567ea8 | 1768 | "--sessions-filename", |
776a2a25 | 1769 | type=str, |
f5567ea8 | 1770 | help="Path to a session configuration file", |
584af91e PP |
1771 | ) |
1772 | parser.add_argument( | |
f5567ea8 FD |
1773 | "-h", |
1774 | "--help", | |
1775 | action="help", | |
584af91e | 1776 | default=argparse.SUPPRESS, |
f5567ea8 | 1777 | help="Show this help message and exit.", |
584af91e PP |
1778 | ) |
1779 | ||
1780 | args = parser.parse_args(args=remaining_args) | |
1781 | try: | |
2b763e29 | 1782 | sessions = _session_descriptors_from_path( |
78169723 FD |
1783 | args.sessions_filename, |
1784 | args.trace_path_prefix, | |
584af91e | 1785 | ) |
e51141d3 SM |
1786 | LttngLiveServer( |
1787 | args.port, args.port_filename, sessions, args.max_query_data_response_size | |
1788 | ) | |
584af91e PP |
1789 | except UnexpectedInput as exc: |
1790 | logging.error(str(exc)) | |
1791 | print(exc, file=sys.stderr) | |
1792 | sys.exit(1) |