Commit | Line | Data |
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7951c4eb YQ |
1 | /* Trace file TFILE format support in GDB. |
2 | ||
e2882c85 | 3 | Copyright (C) 1997-2018 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; | |
7951c4eb YQ |
224 | char buf[MAX_TRACE_UPLOAD]; |
225 | ||
226 | fprintf (writer->fp, "tp T%x:%s:%c:%x:%x", | |
227 | utp->number, phex_nz (utp->addr, sizeof (utp->addr)), | |
228 | (utp->enabled ? 'E' : 'D'), utp->step, utp->pass); | |
229 | if (utp->type == bp_fast_tracepoint) | |
230 | fprintf (writer->fp, ":F%x", utp->orig_size); | |
231 | if (utp->cond) | |
232 | fprintf (writer->fp, | |
233 | ":X%x,%s", (unsigned int) strlen (utp->cond) / 2, | |
234 | utp->cond); | |
235 | fprintf (writer->fp, "\n"); | |
a18ba4e4 | 236 | for (char *act : utp->actions) |
7951c4eb YQ |
237 | fprintf (writer->fp, "tp A%x:%s:%s\n", |
238 | utp->number, phex_nz (utp->addr, sizeof (utp->addr)), act); | |
a18ba4e4 | 239 | for (char *act : utp->step_actions) |
7951c4eb YQ |
240 | fprintf (writer->fp, "tp S%x:%s:%s\n", |
241 | utp->number, phex_nz (utp->addr, sizeof (utp->addr)), act); | |
242 | if (utp->at_string) | |
243 | { | |
244 | encode_source_string (utp->number, utp->addr, | |
245 | "at", utp->at_string, buf, MAX_TRACE_UPLOAD); | |
246 | fprintf (writer->fp, "tp Z%s\n", buf); | |
247 | } | |
248 | if (utp->cond_string) | |
249 | { | |
250 | encode_source_string (utp->number, utp->addr, | |
251 | "cond", utp->cond_string, | |
252 | buf, MAX_TRACE_UPLOAD); | |
253 | fprintf (writer->fp, "tp Z%s\n", buf); | |
254 | } | |
a18ba4e4 | 255 | for (char *act : utp->cmd_strings) |
7951c4eb YQ |
256 | { |
257 | encode_source_string (utp->number, utp->addr, "cmd", act, | |
258 | buf, MAX_TRACE_UPLOAD); | |
259 | fprintf (writer->fp, "tp Z%s\n", buf); | |
260 | } | |
261 | fprintf (writer->fp, "tp V%x:%s:%x:%s\n", | |
262 | utp->number, phex_nz (utp->addr, sizeof (utp->addr)), | |
263 | utp->hit_count, | |
264 | phex_nz (utp->traceframe_usage, | |
265 | sizeof (utp->traceframe_usage))); | |
266 | } | |
267 | ||
18d3cec5 MK |
268 | /* This is the implementation of trace_file_write_ops method |
269 | write_tdesc. */ | |
270 | ||
271 | static void | |
272 | tfile_write_tdesc (struct trace_file_writer *self) | |
273 | { | |
274 | struct tfile_trace_file_writer *writer | |
275 | = (struct tfile_trace_file_writer *) self; | |
18d3cec5 | 276 | |
bd8a901f PA |
277 | gdb::optional<std::string> tdesc |
278 | = target_fetch_description_xml (¤t_target); | |
279 | ||
280 | if (!tdesc) | |
18d3cec5 MK |
281 | return; |
282 | ||
bd8a901f PA |
283 | const char *ptr = tdesc->c_str (); |
284 | ||
18d3cec5 MK |
285 | /* Write tdesc line by line, prefixing each line with "tdesc ". */ |
286 | while (ptr != NULL) | |
287 | { | |
bd8a901f | 288 | const char *next = strchr (ptr, '\n'); |
18d3cec5 MK |
289 | if (next != NULL) |
290 | { | |
291 | fprintf (writer->fp, "tdesc %.*s\n", (int) (next - ptr), ptr); | |
292 | /* Skip the \n. */ | |
293 | next++; | |
294 | } | |
295 | else if (*ptr != '\0') | |
296 | { | |
297 | /* Last line, doesn't have a newline. */ | |
298 | fprintf (writer->fp, "tdesc %s\n", ptr); | |
299 | } | |
300 | ptr = next; | |
301 | } | |
18d3cec5 MK |
302 | } |
303 | ||
7951c4eb YQ |
304 | /* This is the implementation of trace_file_write_ops method |
305 | write_definition_end. */ | |
306 | ||
307 | static void | |
308 | tfile_write_definition_end (struct trace_file_writer *self) | |
309 | { | |
310 | struct tfile_trace_file_writer *writer | |
311 | = (struct tfile_trace_file_writer *) self; | |
312 | ||
313 | fprintf (writer->fp, "\n"); | |
314 | } | |
315 | ||
316 | /* This is the implementation of trace_file_write_ops method | |
317 | write_raw_data. */ | |
318 | ||
319 | static void | |
320 | tfile_write_raw_data (struct trace_file_writer *self, gdb_byte *buf, | |
321 | LONGEST len) | |
322 | { | |
323 | struct tfile_trace_file_writer *writer | |
324 | = (struct tfile_trace_file_writer *) self; | |
325 | ||
326 | if (fwrite (buf, len, 1, writer->fp) < 1) | |
327 | perror_with_name (writer->pathname); | |
328 | } | |
329 | ||
330 | /* This is the implementation of trace_file_write_ops method | |
331 | end. */ | |
332 | ||
333 | static void | |
334 | tfile_end (struct trace_file_writer *self) | |
335 | { | |
336 | struct tfile_trace_file_writer *writer | |
337 | = (struct tfile_trace_file_writer *) self; | |
338 | uint32_t gotten = 0; | |
339 | ||
340 | /* Mark the end of trace data. */ | |
341 | if (fwrite (&gotten, 4, 1, writer->fp) < 1) | |
342 | perror_with_name (writer->pathname); | |
343 | } | |
344 | ||
345 | /* Operations to write trace buffers into TFILE format. */ | |
346 | ||
347 | static const struct trace_file_write_ops tfile_write_ops = | |
348 | { | |
349 | tfile_dtor, | |
350 | tfile_target_save, | |
351 | tfile_start, | |
352 | tfile_write_header, | |
353 | tfile_write_regblock_type, | |
354 | tfile_write_status, | |
355 | tfile_write_uploaded_tsv, | |
356 | tfile_write_uploaded_tp, | |
18d3cec5 | 357 | tfile_write_tdesc, |
7951c4eb YQ |
358 | tfile_write_definition_end, |
359 | tfile_write_raw_data, | |
360 | NULL, | |
361 | tfile_end, | |
362 | }; | |
363 | ||
364 | /* Return a trace writer for TFILE format. */ | |
365 | ||
366 | struct trace_file_writer * | |
367 | tfile_trace_file_writer_new (void) | |
368 | { | |
369 | struct tfile_trace_file_writer *writer | |
8d749320 | 370 | = XNEW (struct tfile_trace_file_writer); |
7951c4eb YQ |
371 | |
372 | writer->base.ops = &tfile_write_ops; | |
373 | writer->fp = NULL; | |
374 | writer->pathname = NULL; | |
375 | ||
376 | return (struct trace_file_writer *) writer; | |
377 | } | |
11395323 YQ |
378 | |
379 | /* target tfile command */ | |
380 | ||
381 | static struct target_ops tfile_ops; | |
382 | ||
383 | /* Fill in tfile_ops with its defined operations and properties. */ | |
384 | ||
385 | #define TRACE_HEADER_SIZE 8 | |
386 | ||
387 | #define TFILE_PID (1) | |
388 | ||
389 | static char *trace_filename; | |
390 | static int trace_fd = -1; | |
391 | static off_t trace_frames_offset; | |
392 | static off_t cur_offset; | |
393 | static int cur_data_size; | |
394 | int trace_regblock_size; | |
5ac87a99 | 395 | static struct buffer trace_tdesc; |
11395323 | 396 | |
5ac87a99 | 397 | static void tfile_append_tdesc_line (const char *line); |
11395323 YQ |
398 | static void tfile_interp_line (char *line, |
399 | struct uploaded_tp **utpp, | |
400 | struct uploaded_tsv **utsvp); | |
401 | ||
402 | /* Read SIZE bytes into READBUF from the trace frame, starting at | |
403 | TRACE_FD's current position. Note that this call `read' | |
404 | underneath, hence it advances the file's seek position. Throws an | |
405 | error if the `read' syscall fails, or less than SIZE bytes are | |
406 | read. */ | |
407 | ||
408 | static void | |
409 | tfile_read (gdb_byte *readbuf, int size) | |
410 | { | |
411 | int gotten; | |
412 | ||
413 | gotten = read (trace_fd, readbuf, size); | |
414 | if (gotten < 0) | |
415 | perror_with_name (trace_filename); | |
416 | else if (gotten < size) | |
417 | error (_("Premature end of file while reading trace file")); | |
418 | } | |
419 | ||
420 | static void | |
014f9477 | 421 | tfile_open (const char *arg, int from_tty) |
11395323 | 422 | { |
11395323 YQ |
423 | int flags; |
424 | int scratch_chan; | |
425 | char header[TRACE_HEADER_SIZE]; | |
426 | char linebuf[1000]; /* Should be max remote packet size or so. */ | |
427 | gdb_byte byte; | |
428 | int bytes, i; | |
429 | struct trace_status *ts; | |
430 | struct uploaded_tp *uploaded_tps = NULL; | |
431 | struct uploaded_tsv *uploaded_tsvs = NULL; | |
432 | ||
433 | target_preopen (from_tty); | |
014f9477 | 434 | if (!arg) |
11395323 YQ |
435 | error (_("No trace file specified.")); |
436 | ||
ee0c3293 TT |
437 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (arg)); |
438 | if (!IS_ABSOLUTE_PATH (filename.get ())) | |
439 | filename.reset (concat (current_directory, "/", filename.get (), | |
440 | (char *) NULL)); | |
11395323 YQ |
441 | |
442 | flags = O_BINARY | O_LARGEFILE; | |
443 | flags |= O_RDONLY; | |
ee0c3293 | 444 | scratch_chan = gdb_open_cloexec (filename.get (), flags, 0); |
11395323 | 445 | if (scratch_chan < 0) |
ee0c3293 | 446 | perror_with_name (filename.get ()); |
11395323 YQ |
447 | |
448 | /* Looks semi-reasonable. Toss the old trace file and work on the new. */ | |
449 | ||
11395323 YQ |
450 | unpush_target (&tfile_ops); |
451 | ||
ee0c3293 | 452 | trace_filename = filename.release (); |
11395323 YQ |
453 | trace_fd = scratch_chan; |
454 | ||
5ac87a99 MK |
455 | /* Make sure this is clear. */ |
456 | buffer_free (&trace_tdesc); | |
457 | ||
11395323 YQ |
458 | bytes = 0; |
459 | /* Read the file header and test for validity. */ | |
460 | tfile_read ((gdb_byte *) &header, TRACE_HEADER_SIZE); | |
461 | ||
462 | bytes += TRACE_HEADER_SIZE; | |
463 | if (!(header[0] == 0x7f | |
61012eef | 464 | && (startswith (header + 1, "TRACE0\n")))) |
11395323 YQ |
465 | error (_("File is not a valid trace file.")); |
466 | ||
467 | push_target (&tfile_ops); | |
468 | ||
469 | trace_regblock_size = 0; | |
470 | ts = current_trace_status (); | |
471 | /* We know we're working with a file. Record its name. */ | |
472 | ts->filename = trace_filename; | |
473 | /* Set defaults in case there is no status line. */ | |
474 | ts->running_known = 0; | |
475 | ts->stop_reason = trace_stop_reason_unknown; | |
476 | ts->traceframe_count = -1; | |
477 | ts->buffer_free = 0; | |
478 | ts->disconnected_tracing = 0; | |
479 | ts->circular_buffer = 0; | |
480 | ||
492d29ea | 481 | TRY |
11395323 YQ |
482 | { |
483 | /* Read through a section of newline-terminated lines that | |
484 | define things like tracepoints. */ | |
485 | i = 0; | |
486 | while (1) | |
487 | { | |
488 | tfile_read (&byte, 1); | |
489 | ||
490 | ++bytes; | |
491 | if (byte == '\n') | |
492 | { | |
493 | /* Empty line marks end of the definition section. */ | |
494 | if (i == 0) | |
495 | break; | |
496 | linebuf[i] = '\0'; | |
497 | i = 0; | |
498 | tfile_interp_line (linebuf, &uploaded_tps, &uploaded_tsvs); | |
499 | } | |
500 | else | |
501 | linebuf[i++] = byte; | |
502 | if (i >= 1000) | |
503 | error (_("Excessively long lines in trace file")); | |
504 | } | |
505 | ||
5ac87a99 MK |
506 | /* By now, tdesc lines have been read from tfile - let's parse them. */ |
507 | target_find_description (); | |
508 | ||
11395323 YQ |
509 | /* Record the starting offset of the binary trace data. */ |
510 | trace_frames_offset = bytes; | |
511 | ||
512 | /* If we don't have a blocksize, we can't interpret the | |
513 | traceframes. */ | |
514 | if (trace_regblock_size == 0) | |
515 | error (_("No register block size recorded in trace file")); | |
516 | } | |
492d29ea | 517 | CATCH (ex, RETURN_MASK_ALL) |
11395323 YQ |
518 | { |
519 | /* Remove the partially set up target. */ | |
520 | unpush_target (&tfile_ops); | |
521 | throw_exception (ex); | |
522 | } | |
492d29ea | 523 | END_CATCH |
11395323 YQ |
524 | |
525 | inferior_appeared (current_inferior (), TFILE_PID); | |
526 | inferior_ptid = pid_to_ptid (TFILE_PID); | |
527 | add_thread_silent (inferior_ptid); | |
528 | ||
529 | if (ts->traceframe_count <= 0) | |
530 | warning (_("No traceframes present in this file.")); | |
531 | ||
532 | /* Add the file's tracepoints and variables into the current mix. */ | |
533 | ||
534 | /* Get trace state variables first, they may be checked when parsing | |
535 | uploaded commands. */ | |
536 | merge_uploaded_trace_state_variables (&uploaded_tsvs); | |
537 | ||
538 | merge_uploaded_tracepoints (&uploaded_tps); | |
539 | ||
540 | post_create_inferior (&tfile_ops, from_tty); | |
541 | } | |
542 | ||
543 | /* Interpret the given line from the definitions part of the trace | |
544 | file. */ | |
545 | ||
546 | static void | |
547 | tfile_interp_line (char *line, struct uploaded_tp **utpp, | |
548 | struct uploaded_tsv **utsvp) | |
549 | { | |
550 | char *p = line; | |
551 | ||
61012eef | 552 | if (startswith (p, "R ")) |
11395323 YQ |
553 | { |
554 | p += strlen ("R "); | |
555 | trace_regblock_size = strtol (p, &p, 16); | |
556 | } | |
61012eef | 557 | else if (startswith (p, "status ")) |
11395323 YQ |
558 | { |
559 | p += strlen ("status "); | |
560 | parse_trace_status (p, current_trace_status ()); | |
561 | } | |
61012eef | 562 | else if (startswith (p, "tp ")) |
11395323 YQ |
563 | { |
564 | p += strlen ("tp "); | |
565 | parse_tracepoint_definition (p, utpp); | |
566 | } | |
61012eef | 567 | else if (startswith (p, "tsv ")) |
11395323 YQ |
568 | { |
569 | p += strlen ("tsv "); | |
570 | parse_tsv_definition (p, utsvp); | |
571 | } | |
5ac87a99 MK |
572 | else if (startswith (p, "tdesc ")) |
573 | { | |
574 | p += strlen ("tdesc "); | |
575 | tfile_append_tdesc_line (p); | |
576 | } | |
11395323 YQ |
577 | else |
578 | warning (_("Ignoring trace file definition \"%s\""), line); | |
579 | } | |
580 | ||
581 | /* Close the trace file and generally clean up. */ | |
582 | ||
583 | static void | |
584 | tfile_close (struct target_ops *self) | |
585 | { | |
586 | int pid; | |
587 | ||
588 | if (trace_fd < 0) | |
589 | return; | |
590 | ||
591 | pid = ptid_get_pid (inferior_ptid); | |
592 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff. */ | |
593 | exit_inferior_silent (pid); | |
594 | ||
595 | close (trace_fd); | |
596 | trace_fd = -1; | |
597 | xfree (trace_filename); | |
598 | trace_filename = NULL; | |
5ac87a99 | 599 | buffer_free (&trace_tdesc); |
11395323 YQ |
600 | |
601 | trace_reset_local_state (); | |
602 | } | |
603 | ||
604 | static void | |
605 | tfile_files_info (struct target_ops *t) | |
606 | { | |
607 | printf_filtered ("\t`%s'\n", trace_filename); | |
608 | } | |
609 | ||
11395323 YQ |
610 | static void |
611 | tfile_get_tracepoint_status (struct target_ops *self, | |
612 | struct breakpoint *tp, struct uploaded_tp *utp) | |
613 | { | |
614 | /* Other bits of trace status were collected as part of opening the | |
615 | trace files, so nothing to do here. */ | |
616 | } | |
617 | ||
618 | /* Given the position of a traceframe in the file, figure out what | |
619 | address the frame was collected at. This would normally be the | |
620 | value of a collected PC register, but if not available, we | |
621 | improvise. */ | |
622 | ||
623 | static CORE_ADDR | |
624 | tfile_get_traceframe_address (off_t tframe_offset) | |
625 | { | |
626 | CORE_ADDR addr = 0; | |
627 | short tpnum; | |
628 | struct tracepoint *tp; | |
629 | off_t saved_offset = cur_offset; | |
630 | ||
631 | /* FIXME dig pc out of collected registers. */ | |
632 | ||
633 | /* Fall back to using tracepoint address. */ | |
634 | lseek (trace_fd, tframe_offset, SEEK_SET); | |
635 | tfile_read ((gdb_byte *) &tpnum, 2); | |
636 | tpnum = (short) extract_signed_integer ((gdb_byte *) &tpnum, 2, | |
637 | gdbarch_byte_order | |
638 | (target_gdbarch ())); | |
639 | ||
640 | tp = get_tracepoint_by_number_on_target (tpnum); | |
641 | /* FIXME this is a poor heuristic if multiple locations. */ | |
c1fc2657 SM |
642 | if (tp && tp->loc) |
643 | addr = tp->loc->address; | |
11395323 YQ |
644 | |
645 | /* Restore our seek position. */ | |
646 | cur_offset = saved_offset; | |
647 | lseek (trace_fd, cur_offset, SEEK_SET); | |
648 | return addr; | |
649 | } | |
650 | ||
651 | /* Given a type of search and some parameters, scan the collection of | |
652 | traceframes in the file looking for a match. When found, return | |
653 | both the traceframe and tracepoint number, otherwise -1 for | |
654 | each. */ | |
655 | ||
656 | static int | |
657 | tfile_trace_find (struct target_ops *self, enum trace_find_type type, int num, | |
658 | CORE_ADDR addr1, CORE_ADDR addr2, int *tpp) | |
659 | { | |
660 | short tpnum; | |
661 | int tfnum = 0, found = 0; | |
662 | unsigned int data_size; | |
663 | struct tracepoint *tp; | |
664 | off_t offset, tframe_offset; | |
665 | CORE_ADDR tfaddr; | |
666 | ||
667 | if (num == -1) | |
668 | { | |
669 | if (tpp) | |
670 | *tpp = -1; | |
671 | return -1; | |
672 | } | |
673 | ||
674 | lseek (trace_fd, trace_frames_offset, SEEK_SET); | |
675 | offset = trace_frames_offset; | |
676 | while (1) | |
677 | { | |
678 | tframe_offset = offset; | |
679 | tfile_read ((gdb_byte *) &tpnum, 2); | |
680 | tpnum = (short) extract_signed_integer ((gdb_byte *) &tpnum, 2, | |
681 | gdbarch_byte_order | |
682 | (target_gdbarch ())); | |
683 | offset += 2; | |
684 | if (tpnum == 0) | |
685 | break; | |
686 | tfile_read ((gdb_byte *) &data_size, 4); | |
687 | data_size = (unsigned int) extract_unsigned_integer | |
688 | ((gdb_byte *) &data_size, 4, | |
689 | gdbarch_byte_order (target_gdbarch ())); | |
690 | offset += 4; | |
691 | ||
692 | if (type == tfind_number) | |
693 | { | |
694 | /* Looking for a specific trace frame. */ | |
695 | if (tfnum == num) | |
696 | found = 1; | |
697 | } | |
698 | else | |
699 | { | |
700 | /* Start from the _next_ trace frame. */ | |
701 | if (tfnum > get_traceframe_number ()) | |
702 | { | |
703 | switch (type) | |
704 | { | |
705 | case tfind_pc: | |
706 | tfaddr = tfile_get_traceframe_address (tframe_offset); | |
707 | if (tfaddr == addr1) | |
708 | found = 1; | |
709 | break; | |
710 | case tfind_tp: | |
711 | tp = get_tracepoint (num); | |
712 | if (tp && tpnum == tp->number_on_target) | |
713 | found = 1; | |
714 | break; | |
715 | case tfind_range: | |
716 | tfaddr = tfile_get_traceframe_address (tframe_offset); | |
717 | if (addr1 <= tfaddr && tfaddr <= addr2) | |
718 | found = 1; | |
719 | break; | |
720 | case tfind_outside: | |
721 | tfaddr = tfile_get_traceframe_address (tframe_offset); | |
722 | if (!(addr1 <= tfaddr && tfaddr <= addr2)) | |
723 | found = 1; | |
724 | break; | |
725 | default: | |
726 | internal_error (__FILE__, __LINE__, _("unknown tfind type")); | |
727 | } | |
728 | } | |
729 | } | |
730 | ||
731 | if (found) | |
732 | { | |
733 | if (tpp) | |
734 | *tpp = tpnum; | |
735 | cur_offset = offset; | |
736 | cur_data_size = data_size; | |
737 | ||
738 | return tfnum; | |
739 | } | |
740 | /* Skip past the traceframe's data. */ | |
741 | lseek (trace_fd, data_size, SEEK_CUR); | |
742 | offset += data_size; | |
743 | /* Update our own count of traceframes. */ | |
744 | ++tfnum; | |
745 | } | |
746 | /* Did not find what we were looking for. */ | |
747 | if (tpp) | |
748 | *tpp = -1; | |
749 | return -1; | |
750 | } | |
751 | ||
752 | /* Prototype of the callback passed to tframe_walk_blocks. */ | |
753 | typedef int (*walk_blocks_callback_func) (char blocktype, void *data); | |
754 | ||
755 | /* Callback for traceframe_walk_blocks, used to find a given block | |
756 | type in a traceframe. */ | |
757 | ||
758 | static int | |
759 | match_blocktype (char blocktype, void *data) | |
760 | { | |
19ba03f4 | 761 | char *wantedp = (char *) data; |
11395323 YQ |
762 | |
763 | if (*wantedp == blocktype) | |
764 | return 1; | |
765 | ||
766 | return 0; | |
767 | } | |
768 | ||
769 | /* Walk over all traceframe block starting at POS offset from | |
770 | CUR_OFFSET, and call CALLBACK for each block found, passing in DATA | |
771 | unmodified. If CALLBACK returns true, this returns the position in | |
772 | the traceframe where the block is found, relative to the start of | |
773 | the traceframe (cur_offset). Returns -1 if no callback call | |
774 | returned true, indicating that all blocks have been walked. */ | |
775 | ||
776 | static int | |
777 | traceframe_walk_blocks (walk_blocks_callback_func callback, | |
778 | int pos, void *data) | |
779 | { | |
780 | /* Iterate through a traceframe's blocks, looking for a block of the | |
781 | requested type. */ | |
782 | ||
783 | lseek (trace_fd, cur_offset + pos, SEEK_SET); | |
784 | while (pos < cur_data_size) | |
785 | { | |
786 | unsigned short mlen; | |
787 | char block_type; | |
788 | ||
789 | tfile_read ((gdb_byte *) &block_type, 1); | |
790 | ||
791 | ++pos; | |
792 | ||
793 | if ((*callback) (block_type, data)) | |
794 | return pos; | |
795 | ||
796 | switch (block_type) | |
797 | { | |
798 | case 'R': | |
799 | lseek (trace_fd, cur_offset + pos + trace_regblock_size, SEEK_SET); | |
800 | pos += trace_regblock_size; | |
801 | break; | |
802 | case 'M': | |
803 | lseek (trace_fd, cur_offset + pos + 8, SEEK_SET); | |
804 | tfile_read ((gdb_byte *) &mlen, 2); | |
805 | mlen = (unsigned short) | |
806 | extract_unsigned_integer ((gdb_byte *) &mlen, 2, | |
807 | gdbarch_byte_order | |
808 | (target_gdbarch ())); | |
809 | lseek (trace_fd, mlen, SEEK_CUR); | |
810 | pos += (8 + 2 + mlen); | |
811 | break; | |
812 | case 'V': | |
813 | lseek (trace_fd, cur_offset + pos + 4 + 8, SEEK_SET); | |
814 | pos += (4 + 8); | |
815 | break; | |
816 | default: | |
817 | error (_("Unknown block type '%c' (0x%x) in trace frame"), | |
818 | block_type, block_type); | |
819 | break; | |
820 | } | |
821 | } | |
822 | ||
823 | return -1; | |
824 | } | |
825 | ||
826 | /* Convenience wrapper around traceframe_walk_blocks. Looks for the | |
827 | position offset of a block of type TYPE_WANTED in the current trace | |
828 | frame, starting at POS. Returns -1 if no such block was found. */ | |
829 | ||
830 | static int | |
831 | traceframe_find_block_type (char type_wanted, int pos) | |
832 | { | |
833 | return traceframe_walk_blocks (match_blocktype, pos, &type_wanted); | |
834 | } | |
835 | ||
836 | /* Look for a block of saved registers in the traceframe, and get the | |
837 | requested register from it. */ | |
838 | ||
839 | static void | |
840 | tfile_fetch_registers (struct target_ops *ops, | |
841 | struct regcache *regcache, int regno) | |
842 | { | |
ac7936df | 843 | struct gdbarch *gdbarch = regcache->arch (); |
e909d859 | 844 | int offset, regn, regsize, dummy; |
11395323 YQ |
845 | |
846 | /* An uninitialized reg size says we're not going to be | |
847 | successful at getting register blocks. */ | |
848 | if (!trace_regblock_size) | |
849 | return; | |
850 | ||
11395323 YQ |
851 | if (traceframe_find_block_type ('R', 0) >= 0) |
852 | { | |
224c3ddb | 853 | gdb_byte *regs = (gdb_byte *) alloca (trace_regblock_size); |
48b6e87e | 854 | |
11395323 YQ |
855 | tfile_read (regs, trace_regblock_size); |
856 | ||
11395323 YQ |
857 | for (regn = 0; regn < gdbarch_num_regs (gdbarch); regn++) |
858 | { | |
ac7936df | 859 | if (!remote_register_number_and_offset (regcache->arch (), |
e909d859 MK |
860 | regn, &dummy, &offset)) |
861 | continue; | |
862 | ||
11395323 YQ |
863 | regsize = register_size (gdbarch, regn); |
864 | /* Make sure we stay within block bounds. */ | |
473b99e5 | 865 | if (offset + regsize > trace_regblock_size) |
11395323 YQ |
866 | break; |
867 | if (regcache_register_status (regcache, regn) == REG_UNKNOWN) | |
868 | { | |
869 | if (regno == regn) | |
870 | { | |
871 | regcache_raw_supply (regcache, regno, regs + offset); | |
872 | break; | |
873 | } | |
874 | else if (regno == -1) | |
875 | { | |
876 | regcache_raw_supply (regcache, regn, regs + offset); | |
877 | } | |
878 | } | |
11395323 | 879 | } |
11395323 | 880 | } |
48b6e87e YQ |
881 | else |
882 | tracefile_fetch_registers (regcache, regno); | |
11395323 YQ |
883 | } |
884 | ||
5ac87a99 MK |
885 | static enum target_xfer_status |
886 | tfile_xfer_partial_features (struct target_ops *ops, const char *annex, | |
887 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
888 | ULONGEST offset, ULONGEST len, | |
889 | ULONGEST *xfered_len) | |
890 | { | |
891 | if (strcmp (annex, "target.xml")) | |
892 | return TARGET_XFER_E_IO; | |
893 | ||
894 | if (readbuf == NULL) | |
895 | error (_("tfile_xfer_partial: tdesc is read-only")); | |
896 | ||
897 | if (trace_tdesc.used_size == 0) | |
898 | return TARGET_XFER_E_IO; | |
899 | ||
900 | if (offset >= trace_tdesc.used_size) | |
901 | return TARGET_XFER_EOF; | |
902 | ||
903 | if (len > trace_tdesc.used_size - offset) | |
904 | len = trace_tdesc.used_size - offset; | |
905 | ||
906 | memcpy (readbuf, trace_tdesc.buffer + offset, len); | |
907 | *xfered_len = len; | |
908 | ||
909 | return TARGET_XFER_OK; | |
910 | } | |
911 | ||
11395323 YQ |
912 | static enum target_xfer_status |
913 | tfile_xfer_partial (struct target_ops *ops, enum target_object object, | |
914 | const char *annex, gdb_byte *readbuf, | |
915 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
916 | ULONGEST *xfered_len) | |
917 | { | |
5ac87a99 MK |
918 | /* We're only doing regular memory and tdesc for now. */ |
919 | if (object == TARGET_OBJECT_AVAILABLE_FEATURES) | |
920 | return tfile_xfer_partial_features (ops, annex, readbuf, writebuf, | |
921 | offset, len, xfered_len); | |
11395323 YQ |
922 | if (object != TARGET_OBJECT_MEMORY) |
923 | return TARGET_XFER_E_IO; | |
924 | ||
925 | if (readbuf == NULL) | |
926 | error (_("tfile_xfer_partial: trace file is read-only")); | |
927 | ||
928 | if (get_traceframe_number () != -1) | |
929 | { | |
930 | int pos = 0; | |
8acf9577 | 931 | enum target_xfer_status res; |
290a839c YQ |
932 | /* Records the lowest available address of all blocks that |
933 | intersects the requested range. */ | |
934 | ULONGEST low_addr_available = 0; | |
11395323 YQ |
935 | |
936 | /* Iterate through the traceframe's blocks, looking for | |
937 | memory. */ | |
938 | while ((pos = traceframe_find_block_type ('M', pos)) >= 0) | |
939 | { | |
940 | ULONGEST maddr, amt; | |
941 | unsigned short mlen; | |
942 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); | |
943 | ||
944 | tfile_read ((gdb_byte *) &maddr, 8); | |
945 | maddr = extract_unsigned_integer ((gdb_byte *) &maddr, 8, | |
946 | byte_order); | |
947 | tfile_read ((gdb_byte *) &mlen, 2); | |
948 | mlen = (unsigned short) | |
949 | extract_unsigned_integer ((gdb_byte *) &mlen, 2, byte_order); | |
950 | ||
951 | /* If the block includes the first part of the desired | |
952 | range, return as much it has; GDB will re-request the | |
953 | remainder, which might be in a different block of this | |
954 | trace frame. */ | |
955 | if (maddr <= offset && offset < (maddr + mlen)) | |
956 | { | |
957 | amt = (maddr + mlen) - offset; | |
958 | if (amt > len) | |
959 | amt = len; | |
960 | ||
961 | if (maddr != offset) | |
962 | lseek (trace_fd, offset - maddr, SEEK_CUR); | |
963 | tfile_read (readbuf, amt); | |
964 | *xfered_len = amt; | |
965 | return TARGET_XFER_OK; | |
966 | } | |
967 | ||
290a839c YQ |
968 | if (offset < maddr && maddr < (offset + len)) |
969 | if (low_addr_available == 0 || low_addr_available > maddr) | |
970 | low_addr_available = maddr; | |
971 | ||
11395323 YQ |
972 | /* Skip over this block. */ |
973 | pos += (8 + 2 + mlen); | |
974 | } | |
11395323 | 975 | |
8acf9577 YQ |
976 | /* Requested memory is unavailable in the context of traceframes, |
977 | and this address falls within a read-only section, fallback | |
290a839c YQ |
978 | to reading from executable, up to LOW_ADDR_AVAILABLE. */ |
979 | if (offset < low_addr_available) | |
325fac50 | 980 | len = std::min (len, low_addr_available - offset); |
8acf9577 YQ |
981 | res = exec_read_partial_read_only (readbuf, offset, len, xfered_len); |
982 | ||
983 | if (res == TARGET_XFER_OK) | |
984 | return TARGET_XFER_OK; | |
985 | else | |
986 | { | |
987 | /* No use trying further, we know some memory starting | |
988 | at MEMADDR isn't available. */ | |
989 | *xfered_len = len; | |
990 | return TARGET_XFER_UNAVAILABLE; | |
991 | } | |
1ee79381 YQ |
992 | } |
993 | else | |
994 | { | |
995 | /* Fallback to reading from read-only sections. */ | |
996 | return section_table_read_available_memory (readbuf, offset, len, | |
997 | xfered_len); | |
998 | } | |
11395323 YQ |
999 | } |
1000 | ||
1001 | /* Iterate through the blocks of a trace frame, looking for a 'V' | |
1002 | block with a matching tsv number. */ | |
1003 | ||
1004 | static int | |
1005 | tfile_get_trace_state_variable_value (struct target_ops *self, | |
1006 | int tsvnum, LONGEST *val) | |
1007 | { | |
1008 | int pos; | |
1009 | int found = 0; | |
1010 | ||
1011 | /* Iterate over blocks in current frame and find the last 'V' | |
1012 | block in which tsv number is TSVNUM. In one trace frame, there | |
1013 | may be multiple 'V' blocks created for a given trace variable, | |
1014 | and the last matched 'V' block contains the updated value. */ | |
1015 | pos = 0; | |
1016 | while ((pos = traceframe_find_block_type ('V', pos)) >= 0) | |
1017 | { | |
1018 | int vnum; | |
1019 | ||
1020 | tfile_read ((gdb_byte *) &vnum, 4); | |
1021 | vnum = (int) extract_signed_integer ((gdb_byte *) &vnum, 4, | |
1022 | gdbarch_byte_order | |
1023 | (target_gdbarch ())); | |
1024 | if (tsvnum == vnum) | |
1025 | { | |
1026 | tfile_read ((gdb_byte *) val, 8); | |
1027 | *val = extract_signed_integer ((gdb_byte *) val, 8, | |
1028 | gdbarch_byte_order | |
1029 | (target_gdbarch ())); | |
1030 | found = 1; | |
1031 | } | |
1032 | pos += (4 + 8); | |
1033 | } | |
1034 | ||
1035 | return found; | |
1036 | } | |
1037 | ||
11395323 YQ |
1038 | /* Callback for traceframe_walk_blocks. Builds a traceframe_info |
1039 | object for the tfile target's current traceframe. */ | |
1040 | ||
1041 | static int | |
1042 | build_traceframe_info (char blocktype, void *data) | |
1043 | { | |
19ba03f4 | 1044 | struct traceframe_info *info = (struct traceframe_info *) data; |
11395323 YQ |
1045 | |
1046 | switch (blocktype) | |
1047 | { | |
1048 | case 'M': | |
1049 | { | |
11395323 YQ |
1050 | ULONGEST maddr; |
1051 | unsigned short mlen; | |
1052 | ||
1053 | tfile_read ((gdb_byte *) &maddr, 8); | |
1054 | maddr = extract_unsigned_integer ((gdb_byte *) &maddr, 8, | |
1055 | gdbarch_byte_order | |
1056 | (target_gdbarch ())); | |
1057 | tfile_read ((gdb_byte *) &mlen, 2); | |
1058 | mlen = (unsigned short) | |
1059 | extract_unsigned_integer ((gdb_byte *) &mlen, | |
1060 | 2, gdbarch_byte_order | |
1061 | (target_gdbarch ())); | |
1062 | ||
4cdd21a8 | 1063 | info->memory.emplace_back (maddr, mlen); |
11395323 YQ |
1064 | break; |
1065 | } | |
1066 | case 'V': | |
1067 | { | |
1068 | int vnum; | |
1069 | ||
1070 | tfile_read ((gdb_byte *) &vnum, 4); | |
d0d292a2 | 1071 | info->tvars.push_back (vnum); |
11395323 YQ |
1072 | } |
1073 | case 'R': | |
1074 | case 'S': | |
1075 | { | |
1076 | break; | |
1077 | } | |
1078 | default: | |
1079 | warning (_("Unhandled trace block type (%d) '%c ' " | |
1080 | "while building trace frame info."), | |
1081 | blocktype, blocktype); | |
1082 | break; | |
1083 | } | |
1084 | ||
1085 | return 0; | |
1086 | } | |
1087 | ||
2098b393 | 1088 | static traceframe_info_up |
11395323 YQ |
1089 | tfile_traceframe_info (struct target_ops *self) |
1090 | { | |
2098b393 SM |
1091 | traceframe_info_up info (new traceframe_info); |
1092 | ||
1093 | traceframe_walk_blocks (build_traceframe_info, 0, info.get ()); | |
11395323 | 1094 | |
11395323 YQ |
1095 | return info; |
1096 | } | |
1097 | ||
5ac87a99 MK |
1098 | /* Handles tdesc lines from tfile by appending the payload to |
1099 | a global trace_tdesc variable. */ | |
1100 | ||
1101 | static void | |
1102 | tfile_append_tdesc_line (const char *line) | |
1103 | { | |
1104 | buffer_grow_str (&trace_tdesc, line); | |
1105 | buffer_grow_str (&trace_tdesc, "\n"); | |
1106 | } | |
1107 | ||
11395323 YQ |
1108 | static void |
1109 | init_tfile_ops (void) | |
1110 | { | |
12e03cd0 YQ |
1111 | init_tracefile_ops (&tfile_ops); |
1112 | ||
11395323 YQ |
1113 | tfile_ops.to_shortname = "tfile"; |
1114 | tfile_ops.to_longname = "Local trace dump file"; | |
1115 | tfile_ops.to_doc | |
1116 | = "Use a trace file as a target. Specify the filename of the trace file."; | |
1117 | tfile_ops.to_open = tfile_open; | |
1118 | tfile_ops.to_close = tfile_close; | |
1119 | tfile_ops.to_fetch_registers = tfile_fetch_registers; | |
1120 | tfile_ops.to_xfer_partial = tfile_xfer_partial; | |
1121 | tfile_ops.to_files_info = tfile_files_info; | |
11395323 YQ |
1122 | tfile_ops.to_get_tracepoint_status = tfile_get_tracepoint_status; |
1123 | tfile_ops.to_trace_find = tfile_trace_find; | |
1124 | tfile_ops.to_get_trace_state_variable_value | |
1125 | = tfile_get_trace_state_variable_value; | |
11395323 | 1126 | tfile_ops.to_traceframe_info = tfile_traceframe_info; |
11395323 YQ |
1127 | } |
1128 | ||
11395323 YQ |
1129 | void |
1130 | _initialize_tracefile_tfile (void) | |
1131 | { | |
1132 | init_tfile_ops (); | |
1133 | ||
1134 | add_target_with_completer (&tfile_ops, filename_completer); | |
1135 | } |