| 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 | } |