Commit | Line | Data |
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7951c4eb YQ |
1 | /* Trace file TFILE format support in GDB. |
2 | ||
61baf725 | 3 | Copyright (C) 1997-2017 Free Software Foundation, Inc. |
7951c4eb YQ |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "tracefile.h" | |
22 | #include "readline/tilde.h" | |
23 | #include "filestuff.h" | |
24 | #include "rsp-low.h" /* bin2hex */ | |
11395323 YQ |
25 | #include "regcache.h" |
26 | #include "inferior.h" | |
27 | #include "gdbthread.h" | |
28 | #include "exec.h" /* exec_bfd */ | |
29 | #include "completer.h" | |
30 | #include "filenames.h" | |
e909d859 | 31 | #include "remote.h" |
18d3cec5 | 32 | #include "xml-tdesc.h" |
5ac87a99 MK |
33 | #include "target-descriptions.h" |
34 | #include "buffer.h" | |
325fac50 | 35 | #include <algorithm> |
11395323 YQ |
36 | |
37 | #ifndef O_LARGEFILE | |
38 | #define O_LARGEFILE 0 | |
39 | #endif | |
7951c4eb YQ |
40 | |
41 | /* TFILE trace writer. */ | |
42 | ||
43 | struct tfile_trace_file_writer | |
44 | { | |
45 | struct trace_file_writer base; | |
46 | ||
47 | /* File pointer to tfile trace file. */ | |
48 | FILE *fp; | |
49 | /* Path name of the tfile trace file. */ | |
50 | char *pathname; | |
51 | }; | |
52 | ||
53 | /* This is the implementation of trace_file_write_ops method | |
54 | target_save. We just call the generic target | |
55 | target_save_trace_data to do target-side saving. */ | |
56 | ||
57 | static int | |
58 | tfile_target_save (struct trace_file_writer *self, | |
59 | const char *filename) | |
60 | { | |
61 | int err = target_save_trace_data (filename); | |
62 | ||
63 | return (err >= 0); | |
64 | } | |
65 | ||
66 | /* This is the implementation of trace_file_write_ops method | |
67 | dtor. */ | |
68 | ||
69 | static void | |
70 | tfile_dtor (struct trace_file_writer *self) | |
71 | { | |
72 | struct tfile_trace_file_writer *writer | |
73 | = (struct tfile_trace_file_writer *) self; | |
74 | ||
75 | xfree (writer->pathname); | |
76 | ||
77 | if (writer->fp != NULL) | |
78 | fclose (writer->fp); | |
79 | } | |
80 | ||
81 | /* This is the implementation of trace_file_write_ops method | |
82 | start. It creates the trace file FILENAME and registers some | |
83 | cleanups. */ | |
84 | ||
85 | static void | |
86 | tfile_start (struct trace_file_writer *self, const char *filename) | |
87 | { | |
88 | struct tfile_trace_file_writer *writer | |
89 | = (struct tfile_trace_file_writer *) self; | |
90 | ||
91 | writer->pathname = tilde_expand (filename); | |
d419f42d | 92 | writer->fp = gdb_fopen_cloexec (writer->pathname, "wb").release (); |
7951c4eb YQ |
93 | if (writer->fp == NULL) |
94 | error (_("Unable to open file '%s' for saving trace data (%s)"), | |
95 | writer->pathname, safe_strerror (errno)); | |
96 | } | |
97 | ||
98 | /* This is the implementation of trace_file_write_ops method | |
99 | write_header. Write the TFILE header. */ | |
100 | ||
101 | static void | |
102 | tfile_write_header (struct trace_file_writer *self) | |
103 | { | |
104 | struct tfile_trace_file_writer *writer | |
105 | = (struct tfile_trace_file_writer *) self; | |
106 | int written; | |
107 | ||
108 | /* Write a file header, with a high-bit-set char to indicate a | |
109 | binary file, plus a hint as what this file is, and a version | |
110 | number in case of future needs. */ | |
111 | written = fwrite ("\x7fTRACE0\n", 8, 1, writer->fp); | |
112 | if (written < 1) | |
113 | perror_with_name (writer->pathname); | |
114 | } | |
115 | ||
116 | /* This is the implementation of trace_file_write_ops method | |
117 | write_regblock_type. Write the size of register block. */ | |
118 | ||
119 | static void | |
120 | tfile_write_regblock_type (struct trace_file_writer *self, int size) | |
121 | { | |
122 | struct tfile_trace_file_writer *writer | |
123 | = (struct tfile_trace_file_writer *) self; | |
124 | ||
125 | fprintf (writer->fp, "R %x\n", size); | |
126 | } | |
127 | ||
128 | /* This is the implementation of trace_file_write_ops method | |
129 | write_status. */ | |
130 | ||
131 | static void | |
132 | tfile_write_status (struct trace_file_writer *self, | |
133 | struct trace_status *ts) | |
134 | { | |
135 | struct tfile_trace_file_writer *writer | |
136 | = (struct tfile_trace_file_writer *) self; | |
137 | ||
138 | fprintf (writer->fp, "status %c;%s", | |
139 | (ts->running ? '1' : '0'), stop_reason_names[ts->stop_reason]); | |
140 | if (ts->stop_reason == tracepoint_error | |
e5a873b7 | 141 | || ts->stop_reason == trace_stop_command) |
7951c4eb YQ |
142 | { |
143 | char *buf = (char *) alloca (strlen (ts->stop_desc) * 2 + 1); | |
144 | ||
145 | bin2hex ((gdb_byte *) ts->stop_desc, buf, strlen (ts->stop_desc)); | |
146 | fprintf (writer->fp, ":%s", buf); | |
147 | } | |
148 | fprintf (writer->fp, ":%x", ts->stopping_tracepoint); | |
149 | if (ts->traceframe_count >= 0) | |
150 | fprintf (writer->fp, ";tframes:%x", ts->traceframe_count); | |
151 | if (ts->traceframes_created >= 0) | |
152 | fprintf (writer->fp, ";tcreated:%x", ts->traceframes_created); | |
153 | if (ts->buffer_free >= 0) | |
154 | fprintf (writer->fp, ";tfree:%x", ts->buffer_free); | |
155 | if (ts->buffer_size >= 0) | |
156 | fprintf (writer->fp, ";tsize:%x", ts->buffer_size); | |
157 | if (ts->disconnected_tracing) | |
158 | fprintf (writer->fp, ";disconn:%x", ts->disconnected_tracing); | |
159 | if (ts->circular_buffer) | |
160 | fprintf (writer->fp, ";circular:%x", ts->circular_buffer); | |
161 | if (ts->start_time) | |
162 | { | |
163 | fprintf (writer->fp, ";starttime:%s", | |
164 | phex_nz (ts->start_time, sizeof (ts->start_time))); | |
165 | } | |
166 | if (ts->stop_time) | |
167 | { | |
168 | fprintf (writer->fp, ";stoptime:%s", | |
169 | phex_nz (ts->stop_time, sizeof (ts->stop_time))); | |
170 | } | |
171 | if (ts->notes != NULL) | |
172 | { | |
173 | char *buf = (char *) alloca (strlen (ts->notes) * 2 + 1); | |
174 | ||
175 | bin2hex ((gdb_byte *) ts->notes, buf, strlen (ts->notes)); | |
176 | fprintf (writer->fp, ";notes:%s", buf); | |
177 | } | |
178 | if (ts->user_name != NULL) | |
179 | { | |
180 | char *buf = (char *) alloca (strlen (ts->user_name) * 2 + 1); | |
181 | ||
182 | bin2hex ((gdb_byte *) ts->user_name, buf, strlen (ts->user_name)); | |
183 | fprintf (writer->fp, ";username:%s", buf); | |
184 | } | |
185 | fprintf (writer->fp, "\n"); | |
186 | } | |
187 | ||
188 | /* This is the implementation of trace_file_write_ops method | |
189 | write_uploaded_tsv. */ | |
190 | ||
191 | static void | |
192 | tfile_write_uploaded_tsv (struct trace_file_writer *self, | |
193 | struct uploaded_tsv *utsv) | |
194 | { | |
a121b7c1 | 195 | char *buf = NULL; |
7951c4eb YQ |
196 | struct tfile_trace_file_writer *writer |
197 | = (struct tfile_trace_file_writer *) self; | |
198 | ||
199 | if (utsv->name) | |
200 | { | |
201 | buf = (char *) xmalloc (strlen (utsv->name) * 2 + 1); | |
202 | bin2hex ((gdb_byte *) (utsv->name), buf, strlen (utsv->name)); | |
203 | } | |
204 | ||
205 | fprintf (writer->fp, "tsv %x:%s:%x:%s\n", | |
206 | utsv->number, phex_nz (utsv->initial_value, 8), | |
a121b7c1 | 207 | utsv->builtin, buf != NULL ? buf : ""); |
7951c4eb YQ |
208 | |
209 | if (utsv->name) | |
210 | xfree (buf); | |
211 | } | |
212 | ||
213 | #define MAX_TRACE_UPLOAD 2000 | |
214 | ||
215 | /* This is the implementation of trace_file_write_ops method | |
216 | write_uploaded_tp. */ | |
217 | ||
218 | static void | |
219 | tfile_write_uploaded_tp (struct trace_file_writer *self, | |
220 | struct uploaded_tp *utp) | |
221 | { | |
222 | struct tfile_trace_file_writer *writer | |
223 | = (struct tfile_trace_file_writer *) self; | |
224 | int a; | |
225 | char *act; | |
226 | char buf[MAX_TRACE_UPLOAD]; | |
227 | ||
228 | fprintf (writer->fp, "tp T%x:%s:%c:%x:%x", | |
229 | utp->number, phex_nz (utp->addr, sizeof (utp->addr)), | |
230 | (utp->enabled ? 'E' : 'D'), utp->step, utp->pass); | |
231 | if (utp->type == bp_fast_tracepoint) | |
232 | fprintf (writer->fp, ":F%x", utp->orig_size); | |
233 | if (utp->cond) | |
234 | fprintf (writer->fp, | |
235 | ":X%x,%s", (unsigned int) strlen (utp->cond) / 2, | |
236 | utp->cond); | |
237 | fprintf (writer->fp, "\n"); | |
238 | for (a = 0; VEC_iterate (char_ptr, utp->actions, a, act); ++a) | |
239 | fprintf (writer->fp, "tp A%x:%s:%s\n", | |
240 | utp->number, phex_nz (utp->addr, sizeof (utp->addr)), act); | |
241 | for (a = 0; VEC_iterate (char_ptr, utp->step_actions, a, act); ++a) | |
242 | fprintf (writer->fp, "tp S%x:%s:%s\n", | |
243 | utp->number, phex_nz (utp->addr, sizeof (utp->addr)), act); | |
244 | if (utp->at_string) | |
245 | { | |
246 | encode_source_string (utp->number, utp->addr, | |
247 | "at", utp->at_string, buf, MAX_TRACE_UPLOAD); | |
248 | fprintf (writer->fp, "tp Z%s\n", buf); | |
249 | } | |
250 | if (utp->cond_string) | |
251 | { | |
252 | encode_source_string (utp->number, utp->addr, | |
253 | "cond", utp->cond_string, | |
254 | buf, MAX_TRACE_UPLOAD); | |
255 | fprintf (writer->fp, "tp Z%s\n", buf); | |
256 | } | |
257 | for (a = 0; VEC_iterate (char_ptr, utp->cmd_strings, a, act); ++a) | |
258 | { | |
259 | encode_source_string (utp->number, utp->addr, "cmd", act, | |
260 | buf, MAX_TRACE_UPLOAD); | |
261 | fprintf (writer->fp, "tp Z%s\n", buf); | |
262 | } | |
263 | fprintf (writer->fp, "tp V%x:%s:%x:%s\n", | |
264 | utp->number, phex_nz (utp->addr, sizeof (utp->addr)), | |
265 | utp->hit_count, | |
266 | phex_nz (utp->traceframe_usage, | |
267 | sizeof (utp->traceframe_usage))); | |
268 | } | |
269 | ||
18d3cec5 MK |
270 | /* This is the implementation of trace_file_write_ops method |
271 | write_tdesc. */ | |
272 | ||
273 | static void | |
274 | tfile_write_tdesc (struct trace_file_writer *self) | |
275 | { | |
276 | struct tfile_trace_file_writer *writer | |
277 | = (struct tfile_trace_file_writer *) self; | |
18d3cec5 | 278 | |
bd8a901f PA |
279 | gdb::optional<std::string> tdesc |
280 | = target_fetch_description_xml (¤t_target); | |
281 | ||
282 | if (!tdesc) | |
18d3cec5 MK |
283 | return; |
284 | ||
bd8a901f PA |
285 | const char *ptr = tdesc->c_str (); |
286 | ||
18d3cec5 MK |
287 | /* Write tdesc line by line, prefixing each line with "tdesc ". */ |
288 | while (ptr != NULL) | |
289 | { | |
bd8a901f | 290 | const char *next = strchr (ptr, '\n'); |
18d3cec5 MK |
291 | if (next != NULL) |
292 | { | |
293 | fprintf (writer->fp, "tdesc %.*s\n", (int) (next - ptr), ptr); | |
294 | /* Skip the \n. */ | |
295 | next++; | |
296 | } | |
297 | else if (*ptr != '\0') | |
298 | { | |
299 | /* Last line, doesn't have a newline. */ | |
300 | fprintf (writer->fp, "tdesc %s\n", ptr); | |
301 | } | |
302 | ptr = next; | |
303 | } | |
18d3cec5 MK |
304 | } |
305 | ||
7951c4eb YQ |
306 | /* This is the implementation of trace_file_write_ops method |
307 | write_definition_end. */ | |
308 | ||
309 | static void | |
310 | tfile_write_definition_end (struct trace_file_writer *self) | |
311 | { | |
312 | struct tfile_trace_file_writer *writer | |
313 | = (struct tfile_trace_file_writer *) self; | |
314 | ||
315 | fprintf (writer->fp, "\n"); | |
316 | } | |
317 | ||
318 | /* This is the implementation of trace_file_write_ops method | |
319 | write_raw_data. */ | |
320 | ||
321 | static void | |
322 | tfile_write_raw_data (struct trace_file_writer *self, gdb_byte *buf, | |
323 | LONGEST len) | |
324 | { | |
325 | struct tfile_trace_file_writer *writer | |
326 | = (struct tfile_trace_file_writer *) self; | |
327 | ||
328 | if (fwrite (buf, len, 1, writer->fp) < 1) | |
329 | perror_with_name (writer->pathname); | |
330 | } | |
331 | ||
332 | /* This is the implementation of trace_file_write_ops method | |
333 | end. */ | |
334 | ||
335 | static void | |
336 | tfile_end (struct trace_file_writer *self) | |
337 | { | |
338 | struct tfile_trace_file_writer *writer | |
339 | = (struct tfile_trace_file_writer *) self; | |
340 | uint32_t gotten = 0; | |
341 | ||
342 | /* Mark the end of trace data. */ | |
343 | if (fwrite (&gotten, 4, 1, writer->fp) < 1) | |
344 | perror_with_name (writer->pathname); | |
345 | } | |
346 | ||
347 | /* Operations to write trace buffers into TFILE format. */ | |
348 | ||
349 | static const struct trace_file_write_ops tfile_write_ops = | |
350 | { | |
351 | tfile_dtor, | |
352 | tfile_target_save, | |
353 | tfile_start, | |
354 | tfile_write_header, | |
355 | tfile_write_regblock_type, | |
356 | tfile_write_status, | |
357 | tfile_write_uploaded_tsv, | |
358 | tfile_write_uploaded_tp, | |
18d3cec5 | 359 | tfile_write_tdesc, |
7951c4eb YQ |
360 | tfile_write_definition_end, |
361 | tfile_write_raw_data, | |
362 | NULL, | |
363 | tfile_end, | |
364 | }; | |
365 | ||
366 | /* Return a trace writer for TFILE format. */ | |
367 | ||
368 | struct trace_file_writer * | |
369 | tfile_trace_file_writer_new (void) | |
370 | { | |
371 | struct tfile_trace_file_writer *writer | |
8d749320 | 372 | = XNEW (struct tfile_trace_file_writer); |
7951c4eb YQ |
373 | |
374 | writer->base.ops = &tfile_write_ops; | |
375 | writer->fp = NULL; | |
376 | writer->pathname = NULL; | |
377 | ||
378 | return (struct trace_file_writer *) writer; | |
379 | } | |
11395323 YQ |
380 | |
381 | /* target tfile command */ | |
382 | ||
383 | static struct target_ops tfile_ops; | |
384 | ||
385 | /* Fill in tfile_ops with its defined operations and properties. */ | |
386 | ||
387 | #define TRACE_HEADER_SIZE 8 | |
388 | ||
389 | #define TFILE_PID (1) | |
390 | ||
391 | static char *trace_filename; | |
392 | static int trace_fd = -1; | |
393 | static off_t trace_frames_offset; | |
394 | static off_t cur_offset; | |
395 | static int cur_data_size; | |
396 | int trace_regblock_size; | |
5ac87a99 | 397 | static struct buffer trace_tdesc; |
11395323 | 398 | |
5ac87a99 | 399 | static void tfile_append_tdesc_line (const char *line); |
11395323 YQ |
400 | static void tfile_interp_line (char *line, |
401 | struct uploaded_tp **utpp, | |
402 | struct uploaded_tsv **utsvp); | |
403 | ||
404 | /* Read SIZE bytes into READBUF from the trace frame, starting at | |
405 | TRACE_FD's current position. Note that this call `read' | |
406 | underneath, hence it advances the file's seek position. Throws an | |
407 | error if the `read' syscall fails, or less than SIZE bytes are | |
408 | read. */ | |
409 | ||
410 | static void | |
411 | tfile_read (gdb_byte *readbuf, int size) | |
412 | { | |
413 | int gotten; | |
414 | ||
415 | gotten = read (trace_fd, readbuf, size); | |
416 | if (gotten < 0) | |
417 | perror_with_name (trace_filename); | |
418 | else if (gotten < size) | |
419 | error (_("Premature end of file while reading trace file")); | |
420 | } | |
421 | ||
422 | static void | |
014f9477 | 423 | tfile_open (const char *arg, int from_tty) |
11395323 | 424 | { |
11395323 | 425 | char *temp; |
11395323 YQ |
426 | int flags; |
427 | int scratch_chan; | |
428 | char header[TRACE_HEADER_SIZE]; | |
429 | char linebuf[1000]; /* Should be max remote packet size or so. */ | |
430 | gdb_byte byte; | |
431 | int bytes, i; | |
432 | struct trace_status *ts; | |
433 | struct uploaded_tp *uploaded_tps = NULL; | |
434 | struct uploaded_tsv *uploaded_tsvs = NULL; | |
435 | ||
436 | target_preopen (from_tty); | |
014f9477 | 437 | if (!arg) |
11395323 YQ |
438 | error (_("No trace file specified.")); |
439 | ||
ee0c3293 TT |
440 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (arg)); |
441 | if (!IS_ABSOLUTE_PATH (filename.get ())) | |
442 | filename.reset (concat (current_directory, "/", filename.get (), | |
443 | (char *) NULL)); | |
11395323 YQ |
444 | |
445 | flags = O_BINARY | O_LARGEFILE; | |
446 | flags |= O_RDONLY; | |
ee0c3293 | 447 | scratch_chan = gdb_open_cloexec (filename.get (), flags, 0); |
11395323 | 448 | if (scratch_chan < 0) |
ee0c3293 | 449 | perror_with_name (filename.get ()); |
11395323 YQ |
450 | |
451 | /* Looks semi-reasonable. Toss the old trace file and work on the new. */ | |
452 | ||
11395323 YQ |
453 | unpush_target (&tfile_ops); |
454 | ||
ee0c3293 | 455 | trace_filename = filename.release (); |
11395323 YQ |
456 | trace_fd = scratch_chan; |
457 | ||
5ac87a99 MK |
458 | /* Make sure this is clear. */ |
459 | buffer_free (&trace_tdesc); | |
460 | ||
11395323 YQ |
461 | bytes = 0; |
462 | /* Read the file header and test for validity. */ | |
463 | tfile_read ((gdb_byte *) &header, TRACE_HEADER_SIZE); | |
464 | ||
465 | bytes += TRACE_HEADER_SIZE; | |
466 | if (!(header[0] == 0x7f | |
61012eef | 467 | && (startswith (header + 1, "TRACE0\n")))) |
11395323 YQ |
468 | error (_("File is not a valid trace file.")); |
469 | ||
470 | push_target (&tfile_ops); | |
471 | ||
472 | trace_regblock_size = 0; | |
473 | ts = current_trace_status (); | |
474 | /* We know we're working with a file. Record its name. */ | |
475 | ts->filename = trace_filename; | |
476 | /* Set defaults in case there is no status line. */ | |
477 | ts->running_known = 0; | |
478 | ts->stop_reason = trace_stop_reason_unknown; | |
479 | ts->traceframe_count = -1; | |
480 | ts->buffer_free = 0; | |
481 | ts->disconnected_tracing = 0; | |
482 | ts->circular_buffer = 0; | |
483 | ||
492d29ea | 484 | TRY |
11395323 YQ |
485 | { |
486 | /* Read through a section of newline-terminated lines that | |
487 | define things like tracepoints. */ | |
488 | i = 0; | |
489 | while (1) | |
490 | { | |
491 | tfile_read (&byte, 1); | |
492 | ||
493 | ++bytes; | |
494 | if (byte == '\n') | |
495 | { | |
496 | /* Empty line marks end of the definition section. */ | |
497 | if (i == 0) | |
498 | break; | |
499 | linebuf[i] = '\0'; | |
500 | i = 0; | |
501 | tfile_interp_line (linebuf, &uploaded_tps, &uploaded_tsvs); | |
502 | } | |
503 | else | |
504 | linebuf[i++] = byte; | |
505 | if (i >= 1000) | |
506 | error (_("Excessively long lines in trace file")); | |
507 | } | |
508 | ||
5ac87a99 MK |
509 | /* By now, tdesc lines have been read from tfile - let's parse them. */ |
510 | target_find_description (); | |
511 | ||
11395323 YQ |
512 | /* Record the starting offset of the binary trace data. */ |
513 | trace_frames_offset = bytes; | |
514 | ||
515 | /* If we don't have a blocksize, we can't interpret the | |
516 | traceframes. */ | |
517 | if (trace_regblock_size == 0) | |
518 | error (_("No register block size recorded in trace file")); | |
519 | } | |
492d29ea | 520 | CATCH (ex, RETURN_MASK_ALL) |
11395323 YQ |
521 | { |
522 | /* Remove the partially set up target. */ | |
523 | unpush_target (&tfile_ops); | |
524 | throw_exception (ex); | |
525 | } | |
492d29ea | 526 | END_CATCH |
11395323 YQ |
527 | |
528 | inferior_appeared (current_inferior (), TFILE_PID); | |
529 | inferior_ptid = pid_to_ptid (TFILE_PID); | |
530 | add_thread_silent (inferior_ptid); | |
531 | ||
532 | if (ts->traceframe_count <= 0) | |
533 | warning (_("No traceframes present in this file.")); | |
534 | ||
535 | /* Add the file's tracepoints and variables into the current mix. */ | |
536 | ||
537 | /* Get trace state variables first, they may be checked when parsing | |
538 | uploaded commands. */ | |
539 | merge_uploaded_trace_state_variables (&uploaded_tsvs); | |
540 | ||
541 | merge_uploaded_tracepoints (&uploaded_tps); | |
542 | ||
543 | post_create_inferior (&tfile_ops, from_tty); | |
544 | } | |
545 | ||
546 | /* Interpret the given line from the definitions part of the trace | |
547 | file. */ | |
548 | ||
549 | static void | |
550 | tfile_interp_line (char *line, struct uploaded_tp **utpp, | |
551 | struct uploaded_tsv **utsvp) | |
552 | { | |
553 | char *p = line; | |
554 | ||
61012eef | 555 | if (startswith (p, "R ")) |
11395323 YQ |
556 | { |
557 | p += strlen ("R "); | |
558 | trace_regblock_size = strtol (p, &p, 16); | |
559 | } | |
61012eef | 560 | else if (startswith (p, "status ")) |
11395323 YQ |
561 | { |
562 | p += strlen ("status "); | |
563 | parse_trace_status (p, current_trace_status ()); | |
564 | } | |
61012eef | 565 | else if (startswith (p, "tp ")) |
11395323 YQ |
566 | { |
567 | p += strlen ("tp "); | |
568 | parse_tracepoint_definition (p, utpp); | |
569 | } | |
61012eef | 570 | else if (startswith (p, "tsv ")) |
11395323 YQ |
571 | { |
572 | p += strlen ("tsv "); | |
573 | parse_tsv_definition (p, utsvp); | |
574 | } | |
5ac87a99 MK |
575 | else if (startswith (p, "tdesc ")) |
576 | { | |
577 | p += strlen ("tdesc "); | |
578 | tfile_append_tdesc_line (p); | |
579 | } | |
11395323 YQ |
580 | else |
581 | warning (_("Ignoring trace file definition \"%s\""), line); | |
582 | } | |
583 | ||
584 | /* Close the trace file and generally clean up. */ | |
585 | ||
586 | static void | |
587 | tfile_close (struct target_ops *self) | |
588 | { | |
589 | int pid; | |
590 | ||
591 | if (trace_fd < 0) | |
592 | return; | |
593 | ||
594 | pid = ptid_get_pid (inferior_ptid); | |
595 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff. */ | |
596 | exit_inferior_silent (pid); | |
597 | ||
598 | close (trace_fd); | |
599 | trace_fd = -1; | |
600 | xfree (trace_filename); | |
601 | trace_filename = NULL; | |
5ac87a99 | 602 | buffer_free (&trace_tdesc); |
11395323 YQ |
603 | |
604 | trace_reset_local_state (); | |
605 | } | |
606 | ||
607 | static void | |
608 | tfile_files_info (struct target_ops *t) | |
609 | { | |
610 | printf_filtered ("\t`%s'\n", trace_filename); | |
611 | } | |
612 | ||
11395323 YQ |
613 | static void |
614 | tfile_get_tracepoint_status (struct target_ops *self, | |
615 | struct breakpoint *tp, struct uploaded_tp *utp) | |
616 | { | |
617 | /* Other bits of trace status were collected as part of opening the | |
618 | trace files, so nothing to do here. */ | |
619 | } | |
620 | ||
621 | /* Given the position of a traceframe in the file, figure out what | |
622 | address the frame was collected at. This would normally be the | |
623 | value of a collected PC register, but if not available, we | |
624 | improvise. */ | |
625 | ||
626 | static CORE_ADDR | |
627 | tfile_get_traceframe_address (off_t tframe_offset) | |
628 | { | |
629 | CORE_ADDR addr = 0; | |
630 | short tpnum; | |
631 | struct tracepoint *tp; | |
632 | off_t saved_offset = cur_offset; | |
633 | ||
634 | /* FIXME dig pc out of collected registers. */ | |
635 | ||
636 | /* Fall back to using tracepoint address. */ | |
637 | lseek (trace_fd, tframe_offset, SEEK_SET); | |
638 | tfile_read ((gdb_byte *) &tpnum, 2); | |
639 | tpnum = (short) extract_signed_integer ((gdb_byte *) &tpnum, 2, | |
640 | gdbarch_byte_order | |
641 | (target_gdbarch ())); | |
642 | ||
643 | tp = get_tracepoint_by_number_on_target (tpnum); | |
644 | /* FIXME this is a poor heuristic if multiple locations. */ | |
c1fc2657 SM |
645 | if (tp && tp->loc) |
646 | addr = tp->loc->address; | |
11395323 YQ |
647 | |
648 | /* Restore our seek position. */ | |
649 | cur_offset = saved_offset; | |
650 | lseek (trace_fd, cur_offset, SEEK_SET); | |
651 | return addr; | |
652 | } | |
653 | ||
654 | /* Given a type of search and some parameters, scan the collection of | |
655 | traceframes in the file looking for a match. When found, return | |
656 | both the traceframe and tracepoint number, otherwise -1 for | |
657 | each. */ | |
658 | ||
659 | static int | |
660 | tfile_trace_find (struct target_ops *self, enum trace_find_type type, int num, | |
661 | CORE_ADDR addr1, CORE_ADDR addr2, int *tpp) | |
662 | { | |
663 | short tpnum; | |
664 | int tfnum = 0, found = 0; | |
665 | unsigned int data_size; | |
666 | struct tracepoint *tp; | |
667 | off_t offset, tframe_offset; | |
668 | CORE_ADDR tfaddr; | |
669 | ||
670 | if (num == -1) | |
671 | { | |
672 | if (tpp) | |
673 | *tpp = -1; | |
674 | return -1; | |
675 | } | |
676 | ||
677 | lseek (trace_fd, trace_frames_offset, SEEK_SET); | |
678 | offset = trace_frames_offset; | |
679 | while (1) | |
680 | { | |
681 | tframe_offset = offset; | |
682 | tfile_read ((gdb_byte *) &tpnum, 2); | |
683 | tpnum = (short) extract_signed_integer ((gdb_byte *) &tpnum, 2, | |
684 | gdbarch_byte_order | |
685 | (target_gdbarch ())); | |
686 | offset += 2; | |
687 | if (tpnum == 0) | |
688 | break; | |
689 | tfile_read ((gdb_byte *) &data_size, 4); | |
690 | data_size = (unsigned int) extract_unsigned_integer | |
691 | ((gdb_byte *) &data_size, 4, | |
692 | gdbarch_byte_order (target_gdbarch ())); | |
693 | offset += 4; | |
694 | ||
695 | if (type == tfind_number) | |
696 | { | |
697 | /* Looking for a specific trace frame. */ | |
698 | if (tfnum == num) | |
699 | found = 1; | |
700 | } | |
701 | else | |
702 | { | |
703 | /* Start from the _next_ trace frame. */ | |
704 | if (tfnum > get_traceframe_number ()) | |
705 | { | |
706 | switch (type) | |
707 | { | |
708 | case tfind_pc: | |
709 | tfaddr = tfile_get_traceframe_address (tframe_offset); | |
710 | if (tfaddr == addr1) | |
711 | found = 1; | |
712 | break; | |
713 | case tfind_tp: | |
714 | tp = get_tracepoint (num); | |
715 | if (tp && tpnum == tp->number_on_target) | |
716 | found = 1; | |
717 | break; | |
718 | case tfind_range: | |
719 | tfaddr = tfile_get_traceframe_address (tframe_offset); | |
720 | if (addr1 <= tfaddr && tfaddr <= addr2) | |
721 | found = 1; | |
722 | break; | |
723 | case tfind_outside: | |
724 | tfaddr = tfile_get_traceframe_address (tframe_offset); | |
725 | if (!(addr1 <= tfaddr && tfaddr <= addr2)) | |
726 | found = 1; | |
727 | break; | |
728 | default: | |
729 | internal_error (__FILE__, __LINE__, _("unknown tfind type")); | |
730 | } | |
731 | } | |
732 | } | |
733 | ||
734 | if (found) | |
735 | { | |
736 | if (tpp) | |
737 | *tpp = tpnum; | |
738 | cur_offset = offset; | |
739 | cur_data_size = data_size; | |
740 | ||
741 | return tfnum; | |
742 | } | |
743 | /* Skip past the traceframe's data. */ | |
744 | lseek (trace_fd, data_size, SEEK_CUR); | |
745 | offset += data_size; | |
746 | /* Update our own count of traceframes. */ | |
747 | ++tfnum; | |
748 | } | |
749 | /* Did not find what we were looking for. */ | |
750 | if (tpp) | |
751 | *tpp = -1; | |
752 | return -1; | |
753 | } | |
754 | ||
755 | /* Prototype of the callback passed to tframe_walk_blocks. */ | |
756 | typedef int (*walk_blocks_callback_func) (char blocktype, void *data); | |
757 | ||
758 | /* Callback for traceframe_walk_blocks, used to find a given block | |
759 | type in a traceframe. */ | |
760 | ||
761 | static int | |
762 | match_blocktype (char blocktype, void *data) | |
763 | { | |
19ba03f4 | 764 | char *wantedp = (char *) data; |
11395323 YQ |
765 | |
766 | if (*wantedp == blocktype) | |
767 | return 1; | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | /* Walk over all traceframe block starting at POS offset from | |
773 | CUR_OFFSET, and call CALLBACK for each block found, passing in DATA | |
774 | unmodified. If CALLBACK returns true, this returns the position in | |
775 | the traceframe where the block is found, relative to the start of | |
776 | the traceframe (cur_offset). Returns -1 if no callback call | |
777 | returned true, indicating that all blocks have been walked. */ | |
778 | ||
779 | static int | |
780 | traceframe_walk_blocks (walk_blocks_callback_func callback, | |
781 | int pos, void *data) | |
782 | { | |
783 | /* Iterate through a traceframe's blocks, looking for a block of the | |
784 | requested type. */ | |
785 | ||
786 | lseek (trace_fd, cur_offset + pos, SEEK_SET); | |
787 | while (pos < cur_data_size) | |
788 | { | |
789 | unsigned short mlen; | |
790 | char block_type; | |
791 | ||
792 | tfile_read ((gdb_byte *) &block_type, 1); | |
793 | ||
794 | ++pos; | |
795 | ||
796 | if ((*callback) (block_type, data)) | |
797 | return pos; | |
798 | ||
799 | switch (block_type) | |
800 | { | |
801 | case 'R': | |
802 | lseek (trace_fd, cur_offset + pos + trace_regblock_size, SEEK_SET); | |
803 | pos += trace_regblock_size; | |
804 | break; | |
805 | case 'M': | |
806 | lseek (trace_fd, cur_offset + pos + 8, SEEK_SET); | |
807 | tfile_read ((gdb_byte *) &mlen, 2); | |
808 | mlen = (unsigned short) | |
809 | extract_unsigned_integer ((gdb_byte *) &mlen, 2, | |
810 | gdbarch_byte_order | |
811 | (target_gdbarch ())); | |
812 | lseek (trace_fd, mlen, SEEK_CUR); | |
813 | pos += (8 + 2 + mlen); | |
814 | break; | |
815 | case 'V': | |
816 | lseek (trace_fd, cur_offset + pos + 4 + 8, SEEK_SET); | |
817 | pos += (4 + 8); | |
818 | break; | |
819 | default: | |
820 | error (_("Unknown block type '%c' (0x%x) in trace frame"), | |
821 | block_type, block_type); | |
822 | break; | |
823 | } | |
824 | } | |
825 | ||
826 | return -1; | |
827 | } | |
828 | ||
829 | /* Convenience wrapper around traceframe_walk_blocks. Looks for the | |
830 | position offset of a block of type TYPE_WANTED in the current trace | |
831 | frame, starting at POS. Returns -1 if no such block was found. */ | |
832 | ||
833 | static int | |
834 | traceframe_find_block_type (char type_wanted, int pos) | |
835 | { | |
836 | return traceframe_walk_blocks (match_blocktype, pos, &type_wanted); | |
837 | } | |
838 | ||
839 | /* Look for a block of saved registers in the traceframe, and get the | |
840 | requested register from it. */ | |
841 | ||
842 | static void | |
843 | tfile_fetch_registers (struct target_ops *ops, | |
844 | struct regcache *regcache, int regno) | |
845 | { | |
846 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
e909d859 | 847 | int offset, regn, regsize, dummy; |
11395323 YQ |
848 | |
849 | /* An uninitialized reg size says we're not going to be | |
850 | successful at getting register blocks. */ | |
851 | if (!trace_regblock_size) | |
852 | return; | |
853 | ||
11395323 YQ |
854 | if (traceframe_find_block_type ('R', 0) >= 0) |
855 | { | |
224c3ddb | 856 | gdb_byte *regs = (gdb_byte *) alloca (trace_regblock_size); |
48b6e87e | 857 | |
11395323 YQ |
858 | tfile_read (regs, trace_regblock_size); |
859 | ||
11395323 YQ |
860 | for (regn = 0; regn < gdbarch_num_regs (gdbarch); regn++) |
861 | { | |
e909d859 MK |
862 | if (!remote_register_number_and_offset (get_regcache_arch (regcache), |
863 | regn, &dummy, &offset)) | |
864 | continue; | |
865 | ||
11395323 YQ |
866 | regsize = register_size (gdbarch, regn); |
867 | /* Make sure we stay within block bounds. */ | |
473b99e5 | 868 | if (offset + regsize > trace_regblock_size) |
11395323 YQ |
869 | break; |
870 | if (regcache_register_status (regcache, regn) == REG_UNKNOWN) | |
871 | { | |
872 | if (regno == regn) | |
873 | { | |
874 | regcache_raw_supply (regcache, regno, regs + offset); | |
875 | break; | |
876 | } | |
877 | else if (regno == -1) | |
878 | { | |
879 | regcache_raw_supply (regcache, regn, regs + offset); | |
880 | } | |
881 | } | |
11395323 | 882 | } |
11395323 | 883 | } |
48b6e87e YQ |
884 | else |
885 | tracefile_fetch_registers (regcache, regno); | |
11395323 YQ |
886 | } |
887 | ||
5ac87a99 MK |
888 | static enum target_xfer_status |
889 | tfile_xfer_partial_features (struct target_ops *ops, const char *annex, | |
890 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
891 | ULONGEST offset, ULONGEST len, | |
892 | ULONGEST *xfered_len) | |
893 | { | |
894 | if (strcmp (annex, "target.xml")) | |
895 | return TARGET_XFER_E_IO; | |
896 | ||
897 | if (readbuf == NULL) | |
898 | error (_("tfile_xfer_partial: tdesc is read-only")); | |
899 | ||
900 | if (trace_tdesc.used_size == 0) | |
901 | return TARGET_XFER_E_IO; | |
902 | ||
903 | if (offset >= trace_tdesc.used_size) | |
904 | return TARGET_XFER_EOF; | |
905 | ||
906 | if (len > trace_tdesc.used_size - offset) | |
907 | len = trace_tdesc.used_size - offset; | |
908 | ||
909 | memcpy (readbuf, trace_tdesc.buffer + offset, len); | |
910 | *xfered_len = len; | |
911 | ||
912 | return TARGET_XFER_OK; | |
913 | } | |
914 | ||
11395323 YQ |
915 | static enum target_xfer_status |
916 | tfile_xfer_partial (struct target_ops *ops, enum target_object object, | |
917 | const char *annex, gdb_byte *readbuf, | |
918 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
919 | ULONGEST *xfered_len) | |
920 | { | |
5ac87a99 MK |
921 | /* We're only doing regular memory and tdesc for now. */ |
922 | if (object == TARGET_OBJECT_AVAILABLE_FEATURES) | |
923 | return tfile_xfer_partial_features (ops, annex, readbuf, writebuf, | |
924 | offset, len, xfered_len); | |
11395323 YQ |
925 | if (object != TARGET_OBJECT_MEMORY) |
926 | return TARGET_XFER_E_IO; | |
927 | ||
928 | if (readbuf == NULL) | |
929 | error (_("tfile_xfer_partial: trace file is read-only")); | |
930 | ||
931 | if (get_traceframe_number () != -1) | |
932 | { | |
933 | int pos = 0; | |
8acf9577 | 934 | enum target_xfer_status res; |
290a839c YQ |
935 | /* Records the lowest available address of all blocks that |
936 | intersects the requested range. */ | |
937 | ULONGEST low_addr_available = 0; | |
11395323 YQ |
938 | |
939 | /* Iterate through the traceframe's blocks, looking for | |
940 | memory. */ | |
941 | while ((pos = traceframe_find_block_type ('M', pos)) >= 0) | |
942 | { | |
943 | ULONGEST maddr, amt; | |
944 | unsigned short mlen; | |
945 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); | |
946 | ||
947 | tfile_read ((gdb_byte *) &maddr, 8); | |
948 | maddr = extract_unsigned_integer ((gdb_byte *) &maddr, 8, | |
949 | byte_order); | |
950 | tfile_read ((gdb_byte *) &mlen, 2); | |
951 | mlen = (unsigned short) | |
952 | extract_unsigned_integer ((gdb_byte *) &mlen, 2, byte_order); | |
953 | ||
954 | /* If the block includes the first part of the desired | |
955 | range, return as much it has; GDB will re-request the | |
956 | remainder, which might be in a different block of this | |
957 | trace frame. */ | |
958 | if (maddr <= offset && offset < (maddr + mlen)) | |
959 | { | |
960 | amt = (maddr + mlen) - offset; | |
961 | if (amt > len) | |
962 | amt = len; | |
963 | ||
964 | if (maddr != offset) | |
965 | lseek (trace_fd, offset - maddr, SEEK_CUR); | |
966 | tfile_read (readbuf, amt); | |
967 | *xfered_len = amt; | |
968 | return TARGET_XFER_OK; | |
969 | } | |
970 | ||
290a839c YQ |
971 | if (offset < maddr && maddr < (offset + len)) |
972 | if (low_addr_available == 0 || low_addr_available > maddr) | |
973 | low_addr_available = maddr; | |
974 | ||
11395323 YQ |
975 | /* Skip over this block. */ |
976 | pos += (8 + 2 + mlen); | |
977 | } | |
11395323 | 978 | |
8acf9577 YQ |
979 | /* Requested memory is unavailable in the context of traceframes, |
980 | and this address falls within a read-only section, fallback | |
290a839c YQ |
981 | to reading from executable, up to LOW_ADDR_AVAILABLE. */ |
982 | if (offset < low_addr_available) | |
325fac50 | 983 | len = std::min (len, low_addr_available - offset); |
8acf9577 YQ |
984 | res = exec_read_partial_read_only (readbuf, offset, len, xfered_len); |
985 | ||
986 | if (res == TARGET_XFER_OK) | |
987 | return TARGET_XFER_OK; | |
988 | else | |
989 | { | |
990 | /* No use trying further, we know some memory starting | |
991 | at MEMADDR isn't available. */ | |
992 | *xfered_len = len; | |
993 | return TARGET_XFER_UNAVAILABLE; | |
994 | } | |
1ee79381 YQ |
995 | } |
996 | else | |
997 | { | |
998 | /* Fallback to reading from read-only sections. */ | |
999 | return section_table_read_available_memory (readbuf, offset, len, | |
1000 | xfered_len); | |
1001 | } | |
11395323 YQ |
1002 | } |
1003 | ||
1004 | /* Iterate through the blocks of a trace frame, looking for a 'V' | |
1005 | block with a matching tsv number. */ | |
1006 | ||
1007 | static int | |
1008 | tfile_get_trace_state_variable_value (struct target_ops *self, | |
1009 | int tsvnum, LONGEST *val) | |
1010 | { | |
1011 | int pos; | |
1012 | int found = 0; | |
1013 | ||
1014 | /* Iterate over blocks in current frame and find the last 'V' | |
1015 | block in which tsv number is TSVNUM. In one trace frame, there | |
1016 | may be multiple 'V' blocks created for a given trace variable, | |
1017 | and the last matched 'V' block contains the updated value. */ | |
1018 | pos = 0; | |
1019 | while ((pos = traceframe_find_block_type ('V', pos)) >= 0) | |
1020 | { | |
1021 | int vnum; | |
1022 | ||
1023 | tfile_read ((gdb_byte *) &vnum, 4); | |
1024 | vnum = (int) extract_signed_integer ((gdb_byte *) &vnum, 4, | |
1025 | gdbarch_byte_order | |
1026 | (target_gdbarch ())); | |
1027 | if (tsvnum == vnum) | |
1028 | { | |
1029 | tfile_read ((gdb_byte *) val, 8); | |
1030 | *val = extract_signed_integer ((gdb_byte *) val, 8, | |
1031 | gdbarch_byte_order | |
1032 | (target_gdbarch ())); | |
1033 | found = 1; | |
1034 | } | |
1035 | pos += (4 + 8); | |
1036 | } | |
1037 | ||
1038 | return found; | |
1039 | } | |
1040 | ||
11395323 YQ |
1041 | /* Callback for traceframe_walk_blocks. Builds a traceframe_info |
1042 | object for the tfile target's current traceframe. */ | |
1043 | ||
1044 | static int | |
1045 | build_traceframe_info (char blocktype, void *data) | |
1046 | { | |
19ba03f4 | 1047 | struct traceframe_info *info = (struct traceframe_info *) data; |
11395323 YQ |
1048 | |
1049 | switch (blocktype) | |
1050 | { | |
1051 | case 'M': | |
1052 | { | |
11395323 YQ |
1053 | ULONGEST maddr; |
1054 | unsigned short mlen; | |
1055 | ||
1056 | tfile_read ((gdb_byte *) &maddr, 8); | |
1057 | maddr = extract_unsigned_integer ((gdb_byte *) &maddr, 8, | |
1058 | gdbarch_byte_order | |
1059 | (target_gdbarch ())); | |
1060 | tfile_read ((gdb_byte *) &mlen, 2); | |
1061 | mlen = (unsigned short) | |
1062 | extract_unsigned_integer ((gdb_byte *) &mlen, | |
1063 | 2, gdbarch_byte_order | |
1064 | (target_gdbarch ())); | |
1065 | ||
4cdd21a8 | 1066 | info->memory.emplace_back (maddr, mlen); |
11395323 YQ |
1067 | break; |
1068 | } | |
1069 | case 'V': | |
1070 | { | |
1071 | int vnum; | |
1072 | ||
1073 | tfile_read ((gdb_byte *) &vnum, 4); | |
d0d292a2 | 1074 | info->tvars.push_back (vnum); |
11395323 YQ |
1075 | } |
1076 | case 'R': | |
1077 | case 'S': | |
1078 | { | |
1079 | break; | |
1080 | } | |
1081 | default: | |
1082 | warning (_("Unhandled trace block type (%d) '%c ' " | |
1083 | "while building trace frame info."), | |
1084 | blocktype, blocktype); | |
1085 | break; | |
1086 | } | |
1087 | ||
1088 | return 0; | |
1089 | } | |
1090 | ||
2098b393 | 1091 | static traceframe_info_up |
11395323 YQ |
1092 | tfile_traceframe_info (struct target_ops *self) |
1093 | { | |
2098b393 SM |
1094 | traceframe_info_up info (new traceframe_info); |
1095 | ||
1096 | traceframe_walk_blocks (build_traceframe_info, 0, info.get ()); | |
11395323 | 1097 | |
11395323 YQ |
1098 | return info; |
1099 | } | |
1100 | ||
5ac87a99 MK |
1101 | /* Handles tdesc lines from tfile by appending the payload to |
1102 | a global trace_tdesc variable. */ | |
1103 | ||
1104 | static void | |
1105 | tfile_append_tdesc_line (const char *line) | |
1106 | { | |
1107 | buffer_grow_str (&trace_tdesc, line); | |
1108 | buffer_grow_str (&trace_tdesc, "\n"); | |
1109 | } | |
1110 | ||
11395323 YQ |
1111 | static void |
1112 | init_tfile_ops (void) | |
1113 | { | |
12e03cd0 YQ |
1114 | init_tracefile_ops (&tfile_ops); |
1115 | ||
11395323 YQ |
1116 | tfile_ops.to_shortname = "tfile"; |
1117 | tfile_ops.to_longname = "Local trace dump file"; | |
1118 | tfile_ops.to_doc | |
1119 | = "Use a trace file as a target. Specify the filename of the trace file."; | |
1120 | tfile_ops.to_open = tfile_open; | |
1121 | tfile_ops.to_close = tfile_close; | |
1122 | tfile_ops.to_fetch_registers = tfile_fetch_registers; | |
1123 | tfile_ops.to_xfer_partial = tfile_xfer_partial; | |
1124 | tfile_ops.to_files_info = tfile_files_info; | |
11395323 YQ |
1125 | tfile_ops.to_get_tracepoint_status = tfile_get_tracepoint_status; |
1126 | tfile_ops.to_trace_find = tfile_trace_find; | |
1127 | tfile_ops.to_get_trace_state_variable_value | |
1128 | = tfile_get_trace_state_variable_value; | |
11395323 | 1129 | tfile_ops.to_traceframe_info = tfile_traceframe_info; |
11395323 YQ |
1130 | } |
1131 | ||
11395323 YQ |
1132 | void |
1133 | _initialize_tracefile_tfile (void) | |
1134 | { | |
1135 | init_tfile_ops (); | |
1136 | ||
1137 | add_target_with_completer (&tfile_ops, filename_completer); | |
1138 | } |