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1 | /* CTF format support. |
2 | ||
3 | Copyright (C) 2012-2013 Free Software Foundation, Inc. | |
4 | Contributed by Hui Zhu <hui_zhu@mentor.com> | |
5 | Contributed by Yao Qi <yao@codesourcery.com> | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "ctf.h" | |
24 | #include "tracepoint.h" | |
25 | #include "regcache.h" | |
26 | ||
27 | #include <ctype.h> | |
28 | ||
29 | /* GDB saves trace buffers and other information (such as trace | |
30 | status) got from the remote target into Common Trace Format (CTF). | |
31 | The following types of information are expected to save in CTF: | |
32 | ||
33 | 1. The length (in bytes) of register cache. Event "register" will | |
34 | be defined in metadata, which includes the length. | |
35 | ||
36 | 2. Trace status. Not implemented yet in CTF writer. | |
37 | ||
38 | 3. Uploaded trace variables and tracepoints. Not implemented yet | |
39 | in CTF writer. | |
40 | ||
41 | 4. Trace frames. Each trace frame is composed by several blocks | |
42 | of different types ('R', 'M', 'V'). One trace frame is saved in | |
43 | one CTF packet and the blocks of this frame are saved as events. | |
44 | 4.1: The trace frame related information (such as the number of | |
45 | tracepoint associated with this frame) is saved in the packet | |
46 | context. | |
47 | 4.2: The block 'M', 'R' and 'V' are saved in event "memory", | |
48 | "register" and "tsv" respectively. | |
49 | 4.3: When iterating over events, babeltrace can't tell iterator | |
50 | goes to a new packet, so we need a marker or anchor to tell GDB | |
51 | that iterator goes into a new packet or frame. We define event | |
52 | "frame". */ | |
53 | ||
54 | #define CTF_MAGIC 0xC1FC1FC1 | |
55 | #define CTF_SAVE_MAJOR 1 | |
56 | #define CTF_SAVE_MINOR 8 | |
57 | ||
58 | #define CTF_METADATA_NAME "metadata" | |
59 | #define CTF_DATASTREAM_NAME "datastream" | |
60 | ||
61 | /* Reserved event id. */ | |
62 | ||
63 | #define CTF_EVENT_ID_REGISTER 0 | |
64 | #define CTF_EVENT_ID_TSV 1 | |
65 | #define CTF_EVENT_ID_MEMORY 2 | |
66 | #define CTF_EVENT_ID_FRAME 3 | |
67 | ||
68 | /* The state kept while writing the CTF datastream file. */ | |
69 | ||
70 | struct trace_write_handler | |
71 | { | |
72 | /* File descriptor of metadata. */ | |
73 | FILE *metadata_fd; | |
74 | /* File descriptor of traceframes. */ | |
75 | FILE *datastream_fd; | |
76 | ||
77 | /* This is the content size of the current packet. */ | |
78 | size_t content_size; | |
79 | ||
80 | /* This is the start offset of current packet. */ | |
81 | long packet_start; | |
82 | }; | |
83 | ||
84 | /* Write metadata in FORMAT. */ | |
85 | ||
86 | static void | |
87 | ctf_save_write_metadata (struct trace_write_handler *handler, | |
88 | const char *format, ...) | |
89 | { | |
90 | va_list args; | |
91 | ||
92 | va_start (args, format); | |
93 | if (vfprintf (handler->metadata_fd, format, args) < 0) | |
94 | error (_("Unable to write metadata file (%s)"), | |
95 | safe_strerror (errno)); | |
96 | va_end (args); | |
97 | } | |
98 | ||
99 | /* Write BUF of length SIZE to datastream file represented by | |
100 | HANDLER. */ | |
101 | ||
102 | static int | |
103 | ctf_save_write (struct trace_write_handler *handler, | |
104 | const gdb_byte *buf, size_t size) | |
105 | { | |
106 | if (fwrite (buf, size, 1, handler->datastream_fd) != 1) | |
107 | error (_("Unable to write file for saving trace data (%s)"), | |
108 | safe_strerror (errno)); | |
109 | ||
110 | handler->content_size += size; | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | /* Write a unsigned 32-bit integer to datastream file represented by | |
116 | HANDLER. */ | |
117 | ||
118 | #define ctf_save_write_uint32(HANDLER, U32) \ | |
119 | ctf_save_write (HANDLER, (gdb_byte *) &U32, 4) | |
120 | ||
121 | /* Set datastream file position. Update HANDLER->content_size | |
122 | if WHENCE is SEEK_CUR. */ | |
123 | ||
124 | static int | |
125 | ctf_save_fseek (struct trace_write_handler *handler, long offset, | |
126 | int whence) | |
127 | { | |
128 | gdb_assert (whence != SEEK_END); | |
129 | gdb_assert (whence != SEEK_SET | |
130 | || offset <= handler->content_size + handler->packet_start); | |
131 | ||
132 | if (fseek (handler->datastream_fd, offset, whence)) | |
133 | error (_("Unable to seek file for saving trace data (%s)"), | |
134 | safe_strerror (errno)); | |
135 | ||
136 | if (whence == SEEK_CUR) | |
137 | handler->content_size += offset; | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | /* Change the datastream file position to align on ALIGN_SIZE, | |
143 | and write BUF to datastream file. The size of BUF is SIZE. */ | |
144 | ||
145 | static int | |
146 | ctf_save_align_write (struct trace_write_handler *handler, | |
147 | const gdb_byte *buf, | |
148 | size_t size, size_t align_size) | |
149 | { | |
150 | long offset | |
151 | = (align_up (handler->content_size, align_size) | |
152 | - handler->content_size); | |
153 | ||
154 | if (ctf_save_fseek (handler, offset, SEEK_CUR)) | |
155 | return -1; | |
156 | ||
157 | if (ctf_save_write (handler, buf, size)) | |
158 | return -1; | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | /* Write events to next new packet. */ | |
164 | ||
165 | static void | |
166 | ctf_save_next_packet (struct trace_write_handler *handler) | |
167 | { | |
168 | handler->packet_start += (handler->content_size + 4); | |
169 | ctf_save_fseek (handler, handler->packet_start, SEEK_SET); | |
170 | handler->content_size = 0; | |
171 | } | |
172 | ||
173 | /* Write the CTF metadata header. */ | |
174 | ||
175 | static void | |
176 | ctf_save_metadata_header (struct trace_write_handler *handler) | |
177 | { | |
178 | const char metadata_fmt[] = | |
179 | "\ntrace {\n" | |
180 | " major = %u;\n" | |
181 | " minor = %u;\n" | |
182 | " byte_order = %s;\n" /* be or le */ | |
183 | " packet.header := struct {\n" | |
184 | " uint32_t magic;\n" | |
185 | " };\n" | |
186 | "};\n" | |
187 | "\n" | |
188 | "stream {\n" | |
189 | " packet.context := struct {\n" | |
190 | " uint32_t content_size;\n" | |
191 | " uint32_t packet_size;\n" | |
192 | " uint16_t tpnum;\n" | |
193 | " };\n" | |
194 | " event.header := struct {\n" | |
195 | " uint32_t id;\n" | |
196 | " };\n" | |
197 | "};\n"; | |
198 | ||
199 | ctf_save_write_metadata (handler, "/* CTF %d.%d */\n", | |
200 | CTF_SAVE_MAJOR, CTF_SAVE_MINOR); | |
201 | ctf_save_write_metadata (handler, | |
202 | "typealias integer { size = 8; align = 8; " | |
203 | "signed = false; encoding = ascii;}" | |
204 | " := ascii;\n"); | |
205 | ctf_save_write_metadata (handler, | |
206 | "typealias integer { size = 8; align = 8; " | |
207 | "signed = false; }" | |
208 | " := uint8_t;\n"); | |
209 | ctf_save_write_metadata (handler, | |
210 | "typealias integer { size = 16; align = 16;" | |
211 | "signed = false; } := uint16_t;\n"); | |
212 | ctf_save_write_metadata (handler, | |
213 | "typealias integer { size = 32; align = 32;" | |
214 | "signed = false; } := uint32_t;\n"); | |
215 | ctf_save_write_metadata (handler, | |
216 | "typealias integer { size = 64; align = 64;" | |
217 | "signed = false; base = hex;}" | |
218 | " := uint64_t;\n"); | |
219 | ctf_save_write_metadata (handler, "\n"); | |
220 | ||
221 | ctf_save_write_metadata (handler, metadata_fmt, | |
222 | CTF_SAVE_MAJOR, CTF_SAVE_MINOR, | |
223 | BYTE_ORDER == LITTLE_ENDIAN ? "le" : "be"); | |
224 | ctf_save_write_metadata (handler, "\n"); | |
225 | } | |
226 | ||
227 | /* CTF trace writer. */ | |
228 | ||
229 | struct ctf_trace_file_writer | |
230 | { | |
231 | struct trace_file_writer base; | |
232 | ||
233 | /* States related to writing CTF trace file. */ | |
234 | struct trace_write_handler tcs; | |
235 | }; | |
236 | ||
237 | /* This is the implementation of trace_file_write_ops method | |
238 | dtor. */ | |
239 | ||
240 | static void | |
241 | ctf_dtor (struct trace_file_writer *self) | |
242 | { | |
243 | struct ctf_trace_file_writer *writer | |
244 | = (struct ctf_trace_file_writer *) self; | |
245 | ||
246 | if (writer->tcs.metadata_fd != NULL) | |
247 | fclose (writer->tcs.metadata_fd); | |
248 | ||
249 | if (writer->tcs.datastream_fd != NULL) | |
250 | fclose (writer->tcs.datastream_fd); | |
251 | ||
252 | } | |
253 | ||
254 | /* This is the implementation of trace_file_write_ops method | |
255 | target_save. */ | |
256 | ||
257 | static int | |
258 | ctf_target_save (struct trace_file_writer *self, | |
259 | const char *dirname) | |
260 | { | |
261 | /* Don't support save trace file to CTF format in the target. */ | |
262 | return 0; | |
263 | } | |
264 | ||
265 | /* This is the implementation of trace_file_write_ops method | |
266 | start. It creates the directory DIRNAME, metadata and datastream | |
267 | in the directory. */ | |
268 | ||
269 | static void | |
270 | ctf_start (struct trace_file_writer *self, const char *dirname) | |
271 | { | |
272 | char *file_name; | |
273 | struct cleanup *old_chain; | |
274 | struct ctf_trace_file_writer *writer | |
275 | = (struct ctf_trace_file_writer *) self; | |
276 | int i; | |
277 | ||
278 | /* Create DIRNAME. */ | |
279 | if (mkdir (dirname, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) | |
280 | && errno != EEXIST) | |
281 | error (_("Unable to open directory '%s' for saving trace data (%s)"), | |
282 | dirname, safe_strerror (errno)); | |
283 | ||
284 | memset (&writer->tcs, '\0', sizeof (writer->tcs)); | |
285 | ||
286 | file_name = xstrprintf ("%s/%s", dirname, CTF_METADATA_NAME); | |
287 | old_chain = make_cleanup (xfree, file_name); | |
288 | ||
289 | writer->tcs.metadata_fd = fopen (file_name, "w"); | |
290 | if (writer->tcs.metadata_fd == NULL) | |
291 | error (_("Unable to open file '%s' for saving trace data (%s)"), | |
292 | file_name, safe_strerror (errno)); | |
293 | do_cleanups (old_chain); | |
294 | ||
295 | ctf_save_metadata_header (&writer->tcs); | |
296 | ||
297 | file_name = xstrprintf ("%s/%s", dirname, CTF_DATASTREAM_NAME); | |
298 | old_chain = make_cleanup (xfree, file_name); | |
299 | writer->tcs.datastream_fd = fopen (file_name, "w"); | |
300 | if (writer->tcs.datastream_fd == NULL) | |
301 | error (_("Unable to open file '%s' for saving trace data (%s)"), | |
302 | file_name, safe_strerror (errno)); | |
303 | do_cleanups (old_chain); | |
304 | } | |
305 | ||
306 | /* This is the implementation of trace_file_write_ops method | |
307 | write_header. Write the types of events on trace variable and | |
308 | frame. */ | |
309 | ||
310 | static void | |
311 | ctf_write_header (struct trace_file_writer *self) | |
312 | { | |
313 | struct ctf_trace_file_writer *writer | |
314 | = (struct ctf_trace_file_writer *) self; | |
315 | ||
316 | ||
317 | ctf_save_write_metadata (&writer->tcs, "\n"); | |
318 | ctf_save_write_metadata (&writer->tcs, | |
319 | "event {\n\tname = \"memory\";\n\tid = %u;\n" | |
320 | "\tfields := struct { \n" | |
321 | "\t\tuint64_t address;\n" | |
322 | "\t\tuint16_t length;\n" | |
323 | "\t\tuint8_t contents[length];\n" | |
324 | "\t};\n" | |
325 | "};\n", CTF_EVENT_ID_MEMORY); | |
326 | ||
327 | ctf_save_write_metadata (&writer->tcs, "\n"); | |
328 | ctf_save_write_metadata (&writer->tcs, | |
329 | "event {\n\tname = \"tsv\";\n\tid = %u;\n" | |
330 | "\tfields := struct { \n" | |
331 | "\t\tuint64_t val;\n" | |
332 | "\t\tuint32_t num;\n" | |
333 | "\t};\n" | |
334 | "};\n", CTF_EVENT_ID_TSV); | |
335 | ||
336 | ctf_save_write_metadata (&writer->tcs, "\n"); | |
337 | ctf_save_write_metadata (&writer->tcs, | |
338 | "event {\n\tname = \"frame\";\n\tid = %u;\n" | |
339 | "\tfields := struct { \n" | |
340 | "\t};\n" | |
341 | "};\n", CTF_EVENT_ID_FRAME); | |
342 | ||
343 | gdb_assert (writer->tcs.content_size == 0); | |
344 | gdb_assert (writer->tcs.packet_start == 0); | |
345 | } | |
346 | ||
347 | /* This is the implementation of trace_file_write_ops method | |
348 | write_regblock_type. Write the type of register event in | |
349 | metadata. */ | |
350 | ||
351 | static void | |
352 | ctf_write_regblock_type (struct trace_file_writer *self, int size) | |
353 | { | |
354 | struct ctf_trace_file_writer *writer | |
355 | = (struct ctf_trace_file_writer *) self; | |
356 | ||
357 | ctf_save_write_metadata (&writer->tcs, "\n"); | |
358 | ||
359 | ctf_save_write_metadata (&writer->tcs, | |
360 | "event {\n\tname = \"register\";\n\tid = %u;\n" | |
361 | "\tfields := struct { \n" | |
362 | "\t\tascii contents[%d];\n" | |
363 | "\t};\n" | |
364 | "};\n", | |
365 | CTF_EVENT_ID_REGISTER, size); | |
366 | } | |
367 | ||
368 | /* This is the implementation of trace_file_write_ops method | |
369 | write_status. */ | |
370 | ||
371 | static void | |
372 | ctf_write_status (struct trace_file_writer *self, | |
373 | struct trace_status *ts) | |
374 | { | |
375 | /* It is not supported yet to write trace status into CTF trace | |
376 | data. */ | |
377 | } | |
378 | ||
379 | /* This is the implementation of trace_file_write_ops method | |
380 | write_uploaded_tsv. */ | |
381 | ||
382 | static void | |
383 | ctf_write_uploaded_tsv (struct trace_file_writer *self, | |
384 | struct uploaded_tsv *tsv) | |
385 | { | |
386 | /* It is not supported yet to write uploaded trace variables | |
387 | into CTF trace data. */ | |
388 | } | |
389 | ||
390 | /* This is the implementation of trace_file_write_ops method | |
391 | write_uploaded_tp. */ | |
392 | ||
393 | static void | |
394 | ctf_write_uploaded_tp (struct trace_file_writer *self, | |
395 | struct uploaded_tp *tp) | |
396 | { | |
397 | /* It is not supported yet to write uploaded tracepoints | |
398 | into CTF trace data. */ | |
399 | } | |
400 | ||
401 | /* This is the implementation of trace_file_write_ops method | |
402 | write_definition_end. */ | |
403 | ||
404 | static void | |
405 | ctf_write_definition_end (struct trace_file_writer *self) | |
406 | { | |
407 | /* Nothing to do for CTF. */ | |
408 | } | |
409 | ||
410 | /* The minimal file size of data stream. It is required by | |
411 | babeltrace. */ | |
412 | ||
413 | #define CTF_FILE_MIN_SIZE 4096 | |
414 | ||
415 | /* This is the implementation of trace_file_write_ops method | |
416 | end. */ | |
417 | ||
418 | static void | |
419 | ctf_end (struct trace_file_writer *self) | |
420 | { | |
421 | struct ctf_trace_file_writer *writer = (struct ctf_trace_file_writer *) self; | |
422 | ||
423 | gdb_assert (writer->tcs.content_size == 0); | |
424 | /* The babeltrace requires or assumes that the size of datastream | |
425 | file is greater than 4096 bytes. If we don't generate enough | |
426 | packets and events, create a fake packet which has zero event, | |
427 | to use up the space. */ | |
428 | if (writer->tcs.packet_start < CTF_FILE_MIN_SIZE) | |
429 | { | |
430 | uint32_t u32; | |
431 | ||
432 | /* magic. */ | |
433 | u32 = CTF_MAGIC; | |
434 | ctf_save_write_uint32 (&writer->tcs, u32); | |
435 | ||
436 | /* content_size. */ | |
437 | u32 = 0; | |
438 | ctf_save_write_uint32 (&writer->tcs, u32); | |
439 | ||
440 | /* packet_size. */ | |
441 | u32 = 12; | |
442 | if (writer->tcs.packet_start + u32 < CTF_FILE_MIN_SIZE) | |
443 | u32 = CTF_FILE_MIN_SIZE - writer->tcs.packet_start; | |
444 | ||
445 | u32 *= TARGET_CHAR_BIT; | |
446 | ctf_save_write_uint32 (&writer->tcs, u32); | |
447 | ||
448 | /* tpnum. */ | |
449 | u32 = 0; | |
450 | ctf_save_write (&writer->tcs, (gdb_byte *) &u32, 2); | |
451 | ||
452 | /* Enlarge the file to CTF_FILE_MIN_SIZE is it is still less | |
453 | than that. */ | |
454 | if (CTF_FILE_MIN_SIZE | |
455 | > (writer->tcs.packet_start + writer->tcs.content_size)) | |
456 | { | |
457 | gdb_byte b = 0; | |
458 | ||
459 | /* Fake the content size to avoid assertion failure in | |
460 | ctf_save_fseek. */ | |
461 | writer->tcs.content_size = (CTF_FILE_MIN_SIZE | |
462 | - 1 - writer->tcs.packet_start); | |
463 | ctf_save_fseek (&writer->tcs, CTF_FILE_MIN_SIZE - 1, | |
464 | SEEK_SET); | |
465 | ctf_save_write (&writer->tcs, &b, 1); | |
466 | } | |
467 | } | |
468 | } | |
469 | ||
470 | /* This is the implementation of trace_frame_write_ops method | |
471 | start. */ | |
472 | ||
473 | static void | |
474 | ctf_write_frame_start (struct trace_file_writer *self, uint16_t tpnum) | |
475 | { | |
476 | struct ctf_trace_file_writer *writer | |
477 | = (struct ctf_trace_file_writer *) self; | |
478 | uint32_t id = CTF_EVENT_ID_FRAME; | |
479 | uint32_t u32; | |
480 | ||
481 | /* Step 1: Write packet context. */ | |
482 | /* magic. */ | |
483 | u32 = CTF_MAGIC; | |
484 | ctf_save_write_uint32 (&writer->tcs, u32); | |
485 | /* content_size and packet_size.. We still don't know the value, | |
486 | write it later. */ | |
487 | ctf_save_fseek (&writer->tcs, 4, SEEK_CUR); | |
488 | ctf_save_fseek (&writer->tcs, 4, SEEK_CUR); | |
489 | /* Tracepoint number. */ | |
490 | ctf_save_write (&writer->tcs, (gdb_byte *) &tpnum, 2); | |
491 | ||
492 | /* Step 2: Write event "frame". */ | |
493 | /* Event Id. */ | |
494 | ctf_save_align_write (&writer->tcs, (gdb_byte *) &id, 4, 4); | |
495 | } | |
496 | ||
497 | /* This is the implementation of trace_frame_write_ops method | |
498 | write_r_block. */ | |
499 | ||
500 | static void | |
501 | ctf_write_frame_r_block (struct trace_file_writer *self, | |
502 | gdb_byte *buf, int32_t size) | |
503 | { | |
504 | struct ctf_trace_file_writer *writer | |
505 | = (struct ctf_trace_file_writer *) self; | |
506 | uint32_t id = CTF_EVENT_ID_REGISTER; | |
507 | ||
508 | /* Event Id. */ | |
509 | ctf_save_align_write (&writer->tcs, (gdb_byte *) &id, 4, 4); | |
510 | ||
511 | /* array contents. */ | |
512 | ctf_save_align_write (&writer->tcs, buf, size, 1); | |
513 | } | |
514 | ||
515 | /* This is the implementation of trace_frame_write_ops method | |
516 | write_m_block_header. */ | |
517 | ||
518 | static void | |
519 | ctf_write_frame_m_block_header (struct trace_file_writer *self, | |
520 | uint64_t addr, uint16_t length) | |
521 | { | |
522 | struct ctf_trace_file_writer *writer | |
523 | = (struct ctf_trace_file_writer *) self; | |
524 | uint32_t event_id = CTF_EVENT_ID_MEMORY; | |
525 | ||
526 | /* Event Id. */ | |
527 | ctf_save_align_write (&writer->tcs, (gdb_byte *) &event_id, 4, 4); | |
528 | ||
529 | /* Address. */ | |
530 | ctf_save_align_write (&writer->tcs, (gdb_byte *) &addr, 8, 8); | |
531 | ||
532 | /* Length. */ | |
533 | ctf_save_align_write (&writer->tcs, (gdb_byte *) &length, 2, 2); | |
534 | } | |
535 | ||
536 | /* This is the implementation of trace_frame_write_ops method | |
537 | write_m_block_memory. */ | |
538 | ||
539 | static void | |
540 | ctf_write_frame_m_block_memory (struct trace_file_writer *self, | |
541 | gdb_byte *buf, uint16_t length) | |
542 | { | |
543 | struct ctf_trace_file_writer *writer | |
544 | = (struct ctf_trace_file_writer *) self; | |
545 | ||
546 | /* Contents. */ | |
547 | ctf_save_align_write (&writer->tcs, (gdb_byte *) buf, length, 1); | |
548 | } | |
549 | ||
550 | /* This is the implementation of trace_frame_write_ops method | |
551 | write_v_block. */ | |
552 | ||
553 | static void | |
554 | ctf_write_frame_v_block (struct trace_file_writer *self, | |
555 | int32_t num, uint64_t val) | |
556 | { | |
557 | struct ctf_trace_file_writer *writer | |
558 | = (struct ctf_trace_file_writer *) self; | |
559 | uint32_t id = CTF_EVENT_ID_TSV; | |
560 | ||
561 | /* Event Id. */ | |
562 | ctf_save_align_write (&writer->tcs, (gdb_byte *) &id, 4, 4); | |
563 | ||
564 | /* val. */ | |
565 | ctf_save_align_write (&writer->tcs, (gdb_byte *) &val, 8, 8); | |
566 | /* num. */ | |
567 | ctf_save_align_write (&writer->tcs, (gdb_byte *) &num, 4, 4); | |
568 | } | |
569 | ||
570 | /* This is the implementation of trace_frame_write_ops method | |
571 | end. */ | |
572 | ||
573 | static void | |
574 | ctf_write_frame_end (struct trace_file_writer *self) | |
575 | { | |
576 | struct ctf_trace_file_writer *writer | |
577 | = (struct ctf_trace_file_writer *) self; | |
578 | uint32_t u32; | |
579 | uint32_t t; | |
580 | ||
581 | /* Write the content size to packet header. */ | |
582 | ctf_save_fseek (&writer->tcs, writer->tcs.packet_start + 4, | |
583 | SEEK_SET); | |
584 | u32 = writer->tcs.content_size * TARGET_CHAR_BIT; | |
585 | ||
586 | t = writer->tcs.content_size; | |
587 | ctf_save_write_uint32 (&writer->tcs, u32); | |
588 | ||
589 | /* Write the packet size. */ | |
590 | u32 += 4 * TARGET_CHAR_BIT; | |
591 | ctf_save_write_uint32 (&writer->tcs, u32); | |
592 | ||
593 | writer->tcs.content_size = t; | |
594 | ||
595 | /* Write zero at the end of the packet. */ | |
596 | ctf_save_fseek (&writer->tcs, writer->tcs.packet_start + t, | |
597 | SEEK_SET); | |
598 | u32 = 0; | |
599 | ctf_save_write_uint32 (&writer->tcs, u32); | |
600 | writer->tcs.content_size = t; | |
601 | ||
602 | ctf_save_next_packet (&writer->tcs); | |
603 | } | |
604 | ||
605 | /* Operations to write various types of trace frames into CTF | |
606 | format. */ | |
607 | ||
608 | static const struct trace_frame_write_ops ctf_write_frame_ops = | |
609 | { | |
610 | ctf_write_frame_start, | |
611 | ctf_write_frame_r_block, | |
612 | ctf_write_frame_m_block_header, | |
613 | ctf_write_frame_m_block_memory, | |
614 | ctf_write_frame_v_block, | |
615 | ctf_write_frame_end, | |
616 | }; | |
617 | ||
618 | /* Operations to write trace buffers into CTF format. */ | |
619 | ||
620 | static const struct trace_file_write_ops ctf_write_ops = | |
621 | { | |
622 | ctf_dtor, | |
623 | ctf_target_save, | |
624 | ctf_start, | |
625 | ctf_write_header, | |
626 | ctf_write_regblock_type, | |
627 | ctf_write_status, | |
628 | ctf_write_uploaded_tsv, | |
629 | ctf_write_uploaded_tp, | |
630 | ctf_write_definition_end, | |
631 | NULL, | |
632 | &ctf_write_frame_ops, | |
633 | ctf_end, | |
634 | }; | |
635 | ||
636 | /* Return a trace writer for CTF format. */ | |
637 | ||
638 | struct trace_file_writer * | |
639 | ctf_trace_file_writer_new (void) | |
640 | { | |
641 | struct ctf_trace_file_writer *writer | |
642 | = xmalloc (sizeof (struct ctf_trace_file_writer)); | |
643 | ||
644 | writer->base.ops = &ctf_write_ops; | |
645 | ||
646 | return (struct trace_file_writer *) writer; | |
647 | } |