| 1 | /* Data structures associated with tracepoints in GDB. |
| 2 | Copyright (C) 1997-2013 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #if !defined (TRACEPOINT_H) |
| 20 | #define TRACEPOINT_H 1 |
| 21 | |
| 22 | #include "breakpoint.h" |
| 23 | #include "target.h" |
| 24 | #include "memrange.h" |
| 25 | #include "gdb_vecs.h" |
| 26 | |
| 27 | /* An object describing the contents of a traceframe. */ |
| 28 | |
| 29 | struct traceframe_info |
| 30 | { |
| 31 | /* Collected memory. */ |
| 32 | VEC(mem_range_s) *memory; |
| 33 | |
| 34 | /* Collected trace state variables. */ |
| 35 | VEC(int) *tvars; |
| 36 | }; |
| 37 | |
| 38 | /* A trace state variable is a value managed by a target being |
| 39 | traced. A trace state variable (or tsv for short) can be accessed |
| 40 | and assigned to by tracepoint actions and conditionals, but is not |
| 41 | part of the program being traced, and it doesn't have to be |
| 42 | collected. Effectively the variables are scratch space for |
| 43 | tracepoints. */ |
| 44 | |
| 45 | struct trace_state_variable |
| 46 | { |
| 47 | /* The variable's name. The user has to prefix with a dollar sign, |
| 48 | but we don't store that internally. */ |
| 49 | const char *name; |
| 50 | |
| 51 | /* An id number assigned by GDB, and transmitted to targets. */ |
| 52 | int number; |
| 53 | |
| 54 | /* The initial value of a variable is a 64-bit signed integer. */ |
| 55 | LONGEST initial_value; |
| 56 | |
| 57 | /* 1 if the value is known, else 0. The value is known during a |
| 58 | trace run, or in tfind mode if the variable was collected into |
| 59 | the current trace frame. */ |
| 60 | int value_known; |
| 61 | |
| 62 | /* The value of a variable is a 64-bit signed integer. */ |
| 63 | LONGEST value; |
| 64 | |
| 65 | /* This is true for variables that are predefined and built into |
| 66 | the target. */ |
| 67 | int builtin; |
| 68 | }; |
| 69 | |
| 70 | /* The trace status encompasses various info about the general state |
| 71 | of the tracing run. */ |
| 72 | |
| 73 | enum trace_stop_reason |
| 74 | { |
| 75 | trace_stop_reason_unknown, |
| 76 | trace_never_run, |
| 77 | tstop_command, |
| 78 | trace_buffer_full, |
| 79 | trace_disconnected, |
| 80 | tracepoint_passcount, |
| 81 | tracepoint_error |
| 82 | }; |
| 83 | |
| 84 | struct trace_status |
| 85 | { |
| 86 | /* If the status is coming from a file rather than a live target, |
| 87 | this points at the file's filename. Otherwise, this is NULL. */ |
| 88 | const char *filename; |
| 89 | |
| 90 | /* This is true if the value of the running field is known. */ |
| 91 | int running_known; |
| 92 | |
| 93 | /* This is true when the trace experiment is actually running. */ |
| 94 | int running; |
| 95 | |
| 96 | enum trace_stop_reason stop_reason; |
| 97 | |
| 98 | /* If stop_reason is tracepoint_passcount or tracepoint_error, this |
| 99 | is the (on-target) number of the tracepoint which caused the |
| 100 | stop. */ |
| 101 | int stopping_tracepoint; |
| 102 | |
| 103 | /* If stop_reason is tstop_command or tracepoint_error, this is an |
| 104 | arbitrary string that may describe the reason for the stop in |
| 105 | more detail. */ |
| 106 | |
| 107 | char *stop_desc; |
| 108 | |
| 109 | /* Number of traceframes currently in the buffer. */ |
| 110 | |
| 111 | int traceframe_count; |
| 112 | |
| 113 | /* Number of traceframes created since start of run. */ |
| 114 | |
| 115 | int traceframes_created; |
| 116 | |
| 117 | /* Total size of the target's trace buffer. */ |
| 118 | |
| 119 | int buffer_size; |
| 120 | |
| 121 | /* Unused bytes left in the target's trace buffer. */ |
| 122 | |
| 123 | int buffer_free; |
| 124 | |
| 125 | /* 1 if the target will continue tracing after disconnection, else |
| 126 | 0. If the target does not report a value, assume 0. */ |
| 127 | |
| 128 | int disconnected_tracing; |
| 129 | |
| 130 | /* 1 if the target is using a circular trace buffer, else 0. If the |
| 131 | target does not report a value, assume 0. */ |
| 132 | |
| 133 | int circular_buffer; |
| 134 | |
| 135 | /* The "name" of the person running the trace. This is an |
| 136 | arbitrary string. */ |
| 137 | |
| 138 | char *user_name; |
| 139 | |
| 140 | /* "Notes" about the trace. This is an arbitrary string not |
| 141 | interpreted by GDBserver in any special way. */ |
| 142 | |
| 143 | char *notes; |
| 144 | |
| 145 | /* The calendar times at which the trace run started and stopped, |
| 146 | both expressed in microseconds of Unix time. */ |
| 147 | |
| 148 | LONGEST start_time; |
| 149 | LONGEST stop_time; |
| 150 | }; |
| 151 | |
| 152 | struct trace_status *current_trace_status (void); |
| 153 | |
| 154 | extern char *default_collect; |
| 155 | |
| 156 | extern int trace_regblock_size; |
| 157 | |
| 158 | /* Struct to collect random info about tracepoints on the target. */ |
| 159 | |
| 160 | struct uploaded_tp |
| 161 | { |
| 162 | int number; |
| 163 | enum bptype type; |
| 164 | ULONGEST addr; |
| 165 | int enabled; |
| 166 | int step; |
| 167 | int pass; |
| 168 | int orig_size; |
| 169 | |
| 170 | /* String that is the encoded form of the tracepoint's condition. */ |
| 171 | char *cond; |
| 172 | |
| 173 | /* Vectors of strings that are the encoded forms of a tracepoint's |
| 174 | actions. */ |
| 175 | VEC(char_ptr) *actions; |
| 176 | VEC(char_ptr) *step_actions; |
| 177 | |
| 178 | /* The original string defining the location of the tracepoint. */ |
| 179 | char *at_string; |
| 180 | |
| 181 | /* The original string defining the tracepoint's condition. */ |
| 182 | char *cond_string; |
| 183 | |
| 184 | /* List of original strings defining the tracepoint's actions. */ |
| 185 | VEC(char_ptr) *cmd_strings; |
| 186 | |
| 187 | /* The tracepoint's current hit count. */ |
| 188 | int hit_count; |
| 189 | |
| 190 | /* The tracepoint's current traceframe usage. */ |
| 191 | ULONGEST traceframe_usage; |
| 192 | |
| 193 | struct uploaded_tp *next; |
| 194 | }; |
| 195 | |
| 196 | /* Struct recording info about trace state variables on the target. */ |
| 197 | |
| 198 | struct uploaded_tsv |
| 199 | { |
| 200 | const char *name; |
| 201 | int number; |
| 202 | LONGEST initial_value; |
| 203 | int builtin; |
| 204 | struct uploaded_tsv *next; |
| 205 | }; |
| 206 | |
| 207 | /* Struct recording info about a target static tracepoint marker. */ |
| 208 | |
| 209 | struct static_tracepoint_marker |
| 210 | { |
| 211 | struct gdbarch *gdbarch; |
| 212 | CORE_ADDR address; |
| 213 | |
| 214 | /* The string ID of the marker. */ |
| 215 | char *str_id; |
| 216 | |
| 217 | /* Extra target reported info associated with the marker. */ |
| 218 | char *extra; |
| 219 | }; |
| 220 | |
| 221 | struct trace_file_writer; |
| 222 | |
| 223 | /* Operations to write trace frames to a specific trace format. */ |
| 224 | |
| 225 | struct trace_frame_write_ops |
| 226 | { |
| 227 | /* Write a new trace frame. The tracepoint number of this trace |
| 228 | frame is TPNUM. */ |
| 229 | void (*start) (struct trace_file_writer *self, uint16_t tpnum); |
| 230 | |
| 231 | /* Write an 'R' block. Buffer BUF contains its contents and SIZE is |
| 232 | its size. */ |
| 233 | void (*write_r_block) (struct trace_file_writer *self, |
| 234 | gdb_byte *buf, int32_t size); |
| 235 | |
| 236 | /* Write an 'M' block, the header and memory contents respectively. |
| 237 | The header of 'M' block is composed of the start address and the |
| 238 | length of memory collection, and the memory contents contain |
| 239 | the collected memory contents in tracing. |
| 240 | For extremely large M block, GDB is unable to get its contents |
| 241 | and write them into trace file in one go, due to the limitation |
| 242 | of the remote target or the size of internal buffer, we split |
| 243 | the operation to 'M' block to two operations. */ |
| 244 | /* Write the head of 'M' block. ADDR is the start address of |
| 245 | collected memory and LENGTH is the length of memory contents. */ |
| 246 | void (*write_m_block_header) (struct trace_file_writer *self, |
| 247 | uint64_t addr, uint16_t length); |
| 248 | /* Write the memory contents of 'M' block. Buffer BUF contains |
| 249 | its contents and LENGTH is its length. This method can be called |
| 250 | multiple times to write large memory contents of a single 'M' |
| 251 | block. */ |
| 252 | void (*write_m_block_memory) (struct trace_file_writer *self, |
| 253 | gdb_byte *buf, uint16_t length); |
| 254 | |
| 255 | /* Write a 'V' block. NUM is the trace variable number and VAL is |
| 256 | the value of the trace variable. */ |
| 257 | void (*write_v_block) (struct trace_file_writer *self, int32_t num, |
| 258 | uint64_t val); |
| 259 | |
| 260 | /* The end of the trace frame. */ |
| 261 | void (*end) (struct trace_file_writer *self); |
| 262 | }; |
| 263 | |
| 264 | /* Operations to write trace buffers to a specific trace format. */ |
| 265 | |
| 266 | struct trace_file_write_ops |
| 267 | { |
| 268 | /* Destructor. Releases everything from SELF (but not SELF |
| 269 | itself). */ |
| 270 | void (*dtor) (struct trace_file_writer *self); |
| 271 | |
| 272 | /* Save the data to file or directory NAME of desired format in |
| 273 | target side. Return true for success, otherwise return |
| 274 | false. */ |
| 275 | int (*target_save) (struct trace_file_writer *self, |
| 276 | const char *name); |
| 277 | |
| 278 | /* Write the trace buffers to file or directory NAME. */ |
| 279 | void (*start) (struct trace_file_writer *self, |
| 280 | const char *name); |
| 281 | |
| 282 | /* Write the trace header. */ |
| 283 | void (*write_header) (struct trace_file_writer *self); |
| 284 | |
| 285 | /* Write the type of block about registers. SIZE is the size of |
| 286 | all registers on the target. */ |
| 287 | void (*write_regblock_type) (struct trace_file_writer *self, |
| 288 | int size); |
| 289 | |
| 290 | /* Write trace status TS. */ |
| 291 | void (*write_status) (struct trace_file_writer *self, |
| 292 | struct trace_status *ts); |
| 293 | |
| 294 | /* Write the uploaded TSV. */ |
| 295 | void (*write_uploaded_tsv) (struct trace_file_writer *self, |
| 296 | struct uploaded_tsv *tsv); |
| 297 | |
| 298 | /* Write the uploaded tracepoint TP. */ |
| 299 | void (*write_uploaded_tp) (struct trace_file_writer *self, |
| 300 | struct uploaded_tp *tp); |
| 301 | |
| 302 | /* Write to mark the end of the definition part. */ |
| 303 | void (*write_definition_end) (struct trace_file_writer *self); |
| 304 | |
| 305 | /* Write the data of trace buffer without parsing. The content is |
| 306 | in BUF and length is LEN. */ |
| 307 | void (*write_trace_buffer) (struct trace_file_writer *self, |
| 308 | gdb_byte *buf, LONGEST len); |
| 309 | |
| 310 | /* Operations to write trace frames. The user of this field is |
| 311 | responsible to parse the data of trace buffer. Either field |
| 312 | 'write_trace_buffer' or field ' frame_ops' is NULL. */ |
| 313 | const struct trace_frame_write_ops *frame_ops; |
| 314 | |
| 315 | /* The end of writing trace buffers. */ |
| 316 | void (*end) (struct trace_file_writer *self); |
| 317 | }; |
| 318 | |
| 319 | /* Trace file writer for a given format. */ |
| 320 | |
| 321 | struct trace_file_writer |
| 322 | { |
| 323 | const struct trace_file_write_ops *ops; |
| 324 | }; |
| 325 | |
| 326 | struct memrange |
| 327 | { |
| 328 | /* memrange_absolute for absolute memory range, else basereg |
| 329 | number. */ |
| 330 | int type; |
| 331 | bfd_signed_vma start; |
| 332 | bfd_signed_vma end; |
| 333 | }; |
| 334 | |
| 335 | struct collection_list |
| 336 | { |
| 337 | /* room for up to 256 regs */ |
| 338 | unsigned char regs_mask[32]; |
| 339 | long listsize; |
| 340 | long next_memrange; |
| 341 | struct memrange *list; |
| 342 | |
| 343 | /* size of array pointed to by expr_list elt. */ |
| 344 | long aexpr_listsize; |
| 345 | long next_aexpr_elt; |
| 346 | struct agent_expr **aexpr_list; |
| 347 | |
| 348 | /* True is the user requested a collection of "$_sdata", "static |
| 349 | tracepoint data". */ |
| 350 | int strace_data; |
| 351 | |
| 352 | /* A set of names of wholly collected objects. */ |
| 353 | VEC(char_ptr) *wholly_collected; |
| 354 | /* A set of computed expressions. */ |
| 355 | VEC(char_ptr) *computed; |
| 356 | }; |
| 357 | |
| 358 | extern void parse_static_tracepoint_marker_definition |
| 359 | (char *line, char **pp, |
| 360 | struct static_tracepoint_marker *marker); |
| 361 | extern void release_static_tracepoint_marker (struct static_tracepoint_marker *); |
| 362 | extern void free_current_marker (void *arg); |
| 363 | |
| 364 | /* A hook used to notify the UI of tracepoint operations. */ |
| 365 | |
| 366 | extern void (*deprecated_trace_find_hook) (char *arg, int from_tty); |
| 367 | extern void (*deprecated_trace_start_stop_hook) (int start, int from_tty); |
| 368 | |
| 369 | /* Returns the current traceframe number. */ |
| 370 | extern int get_traceframe_number (void); |
| 371 | |
| 372 | /* Returns the tracepoint number for current traceframe. */ |
| 373 | extern int get_tracepoint_number (void); |
| 374 | |
| 375 | /* Make the traceframe NUM be the current GDB trace frame number, and |
| 376 | do nothing more. In particular, this does not flush the |
| 377 | register/frame caches or notify the target about the trace frame |
| 378 | change, so that is can be used when we need to momentarily access |
| 379 | live memory. Targets lazily switch their current traceframe to |
| 380 | match GDB's traceframe number, at the appropriate times. */ |
| 381 | extern void set_traceframe_number (int); |
| 382 | |
| 383 | /* Make the traceframe NUM be the current trace frame, all the way to |
| 384 | the target, and flushes all global state (register/frame caches, |
| 385 | etc.). */ |
| 386 | extern void set_current_traceframe (int num); |
| 387 | |
| 388 | struct cleanup *make_cleanup_restore_current_traceframe (void); |
| 389 | struct cleanup *make_cleanup_restore_traceframe_number (void); |
| 390 | |
| 391 | void free_actions (struct breakpoint *); |
| 392 | |
| 393 | extern const char *decode_agent_options (const char *exp, int *trace_string); |
| 394 | |
| 395 | extern struct cleanup * |
| 396 | encode_actions_and_make_cleanup (struct bp_location *tloc, |
| 397 | struct collection_list *tracepoint_list, |
| 398 | struct collection_list *stepping_list); |
| 399 | |
| 400 | extern void encode_actions_rsp (struct bp_location *tloc, |
| 401 | char ***tdp_actions, char ***stepping_actions); |
| 402 | |
| 403 | extern void validate_actionline (const char *, struct breakpoint *); |
| 404 | extern void validate_trace_state_variable_name (const char *name); |
| 405 | |
| 406 | extern struct trace_state_variable *find_trace_state_variable (const char *name); |
| 407 | extern struct trace_state_variable * |
| 408 | find_trace_state_variable_by_number (int number); |
| 409 | |
| 410 | extern struct trace_state_variable *create_trace_state_variable (const char *name); |
| 411 | |
| 412 | extern int encode_source_string (int num, ULONGEST addr, |
| 413 | char *srctype, char *src, |
| 414 | char *buf, int buf_size); |
| 415 | |
| 416 | extern void parse_trace_status (char *line, struct trace_status *ts); |
| 417 | |
| 418 | extern void parse_tracepoint_status (char *p, struct breakpoint *tp, |
| 419 | struct uploaded_tp *utp); |
| 420 | |
| 421 | extern void parse_tracepoint_definition (char *line, |
| 422 | struct uploaded_tp **utpp); |
| 423 | extern void parse_tsv_definition (char *line, struct uploaded_tsv **utsvp); |
| 424 | |
| 425 | extern struct uploaded_tp *get_uploaded_tp (int num, ULONGEST addr, |
| 426 | struct uploaded_tp **utpp); |
| 427 | extern struct uploaded_tsv *get_uploaded_tsv (int num, |
| 428 | struct uploaded_tsv **utsvp); |
| 429 | extern struct tracepoint *create_tracepoint_from_upload (struct uploaded_tp *utp); |
| 430 | extern void merge_uploaded_tracepoints (struct uploaded_tp **utpp); |
| 431 | extern void merge_uploaded_trace_state_variables (struct uploaded_tsv **utsvp); |
| 432 | |
| 433 | extern void query_if_trace_running (int from_tty); |
| 434 | extern void disconnect_tracing (void); |
| 435 | extern void trace_reset_local_state (void); |
| 436 | |
| 437 | extern void start_tracing (char *notes); |
| 438 | extern void stop_tracing (char *notes); |
| 439 | |
| 440 | extern void trace_status_mi (int on_stop); |
| 441 | |
| 442 | extern void tvariables_info_1 (void); |
| 443 | extern void save_trace_state_variables (struct ui_file *fp); |
| 444 | |
| 445 | extern void tfind_1 (enum trace_find_type type, int num, |
| 446 | CORE_ADDR addr1, CORE_ADDR addr2, |
| 447 | int from_tty); |
| 448 | |
| 449 | extern void trace_save_tfile (const char *filename, |
| 450 | int target_does_save); |
| 451 | extern void trace_save_ctf (const char *dirname, |
| 452 | int target_does_save); |
| 453 | |
| 454 | extern struct traceframe_info *parse_traceframe_info (const char *tframe_info); |
| 455 | |
| 456 | extern int traceframe_available_memory (VEC(mem_range_s) **result, |
| 457 | CORE_ADDR memaddr, ULONGEST len); |
| 458 | |
| 459 | extern struct traceframe_info *get_traceframe_info (void); |
| 460 | |
| 461 | extern struct bp_location *get_traceframe_location (int *stepping_frame_p); |
| 462 | |
| 463 | #endif /* TRACEPOINT_H */ |