1 /* Data structures associated with tracepoints in GDB.
2 Copyright (C) 1997-2013 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
19 #if !defined (TRACEPOINT_H)
20 #define TRACEPOINT_H 1
22 #include "breakpoint.h"
27 /* An object describing the contents of a traceframe. */
29 struct traceframe_info
31 /* Collected memory. */
32 VEC(mem_range_s) *memory;
35 /* A trace state variable is a value managed by a target being
36 traced. A trace state variable (or tsv for short) can be accessed
37 and assigned to by tracepoint actions and conditionals, but is not
38 part of the program being traced, and it doesn't have to be
39 collected. Effectively the variables are scratch space for
42 struct trace_state_variable
44 /* The variable's name. The user has to prefix with a dollar sign,
45 but we don't store that internally. */
48 /* An id number assigned by GDB, and transmitted to targets. */
51 /* The initial value of a variable is a 64-bit signed integer. */
52 LONGEST initial_value;
54 /* 1 if the value is known, else 0. The value is known during a
55 trace run, or in tfind mode if the variable was collected into
56 the current trace frame. */
59 /* The value of a variable is a 64-bit signed integer. */
62 /* This is true for variables that are predefined and built into
67 /* The trace status encompasses various info about the general state
68 of the tracing run. */
70 enum trace_stop_reason
72 trace_stop_reason_unknown,
83 /* If the status is coming from a file rather than a live target,
84 this points at the file's filename. Otherwise, this is NULL. */
87 /* This is true if the value of the running field is known. */
90 /* This is true when the trace experiment is actually running. */
93 enum trace_stop_reason stop_reason;
95 /* If stop_reason is tracepoint_passcount or tracepoint_error, this
96 is the (on-target) number of the tracepoint which caused the
98 int stopping_tracepoint;
100 /* If stop_reason is tstop_command or tracepoint_error, this is an
101 arbitrary string that may describe the reason for the stop in
106 /* Number of traceframes currently in the buffer. */
108 int traceframe_count;
110 /* Number of traceframes created since start of run. */
112 int traceframes_created;
114 /* Total size of the target's trace buffer. */
118 /* Unused bytes left in the target's trace buffer. */
122 /* 1 if the target will continue tracing after disconnection, else
123 0. If the target does not report a value, assume 0. */
125 int disconnected_tracing;
127 /* 1 if the target is using a circular trace buffer, else 0. If the
128 target does not report a value, assume 0. */
132 /* The "name" of the person running the trace. This is an
137 /* "Notes" about the trace. This is an arbitrary string not
138 interpreted by GDBserver in any special way. */
142 /* The calendar times at which the trace run started and stopped,
143 both expressed in microseconds of Unix time. */
149 struct trace_status *current_trace_status (void);
151 extern char *default_collect;
153 extern int trace_regblock_size;
155 /* Struct to collect random info about tracepoints on the target. */
167 /* String that is the encoded form of the tracepoint's condition. */
170 /* Vectors of strings that are the encoded forms of a tracepoint's
172 VEC(char_ptr) *actions;
173 VEC(char_ptr) *step_actions;
175 /* The original string defining the location of the tracepoint. */
178 /* The original string defining the tracepoint's condition. */
181 /* List of original strings defining the tracepoint's actions. */
182 VEC(char_ptr) *cmd_strings;
184 /* The tracepoint's current hit count. */
187 /* The tracepoint's current traceframe usage. */
188 ULONGEST traceframe_usage;
190 struct uploaded_tp *next;
193 /* Struct recording info about trace state variables on the target. */
199 LONGEST initial_value;
201 struct uploaded_tsv *next;
204 /* Struct recording info about a target static tracepoint marker. */
206 struct static_tracepoint_marker
208 struct gdbarch *gdbarch;
211 /* The string ID of the marker. */
214 /* Extra target reported info associated with the marker. */
218 struct trace_file_writer;
220 /* Operations to write trace frames to a specific trace format. */
222 struct trace_frame_write_ops
224 /* Write a new trace frame. The tracepoint number of this trace
226 void (*start) (struct trace_file_writer *self, uint16_t tpnum);
228 /* Write an 'R' block. Buffer BUF contains its contents and SIZE is
230 void (*write_r_block) (struct trace_file_writer *self,
231 gdb_byte *buf, int32_t size);
233 /* Write an 'M' block, the header and memory contents respectively.
234 The header of 'M' block is composed of the start address and the
235 length of memory collection, and the memory contents contain
236 the collected memory contents in tracing.
237 For extremely large M block, GDB is unable to get its contents
238 and write them into trace file in one go, due to the limitation
239 of the remote target or the size of internal buffer, we split
240 the operation to 'M' block to two operations. */
241 /* Write the head of 'M' block. ADDR is the start address of
242 collected memory and LENGTH is the length of memory contents. */
243 void (*write_m_block_header) (struct trace_file_writer *self,
244 uint64_t addr, uint16_t length);
245 /* Write the memory contents of 'M' block. Buffer BUF contains
246 its contents and LENGTH is its length. This method can be called
247 multiple times to write large memory contents of a single 'M'
249 void (*write_m_block_memory) (struct trace_file_writer *self,
250 gdb_byte *buf, uint16_t length);
252 /* Write a 'V' block. NUM is the trace variable number and VAL is
253 the value of the trace variable. */
254 void (*write_v_block) (struct trace_file_writer *self, int32_t num,
257 /* The end of the trace frame. */
258 void (*end) (struct trace_file_writer *self);
261 /* Operations to write trace buffers to a specific trace format. */
263 struct trace_file_write_ops
265 /* Destructor. Releases everything from SELF (but not SELF
267 void (*dtor) (struct trace_file_writer *self);
269 /* Save the data to file or directory NAME of desired format in
270 target side. Return true for success, otherwise return
272 int (*target_save) (struct trace_file_writer *self,
275 /* Write the trace buffers to file or directory NAME. */
276 void (*start) (struct trace_file_writer *self,
279 /* Write the trace header. */
280 void (*write_header) (struct trace_file_writer *self);
282 /* Write the type of block about registers. SIZE is the size of
283 all registers on the target. */
284 void (*write_regblock_type) (struct trace_file_writer *self,
287 /* Write trace status TS. */
288 void (*write_status) (struct trace_file_writer *self,
289 struct trace_status *ts);
291 /* Write the uploaded TSV. */
292 void (*write_uploaded_tsv) (struct trace_file_writer *self,
293 struct uploaded_tsv *tsv);
295 /* Write the uploaded tracepoint TP. */
296 void (*write_uploaded_tp) (struct trace_file_writer *self,
297 struct uploaded_tp *tp);
299 /* Write to mark the end of the definition part. */
300 void (*write_definition_end) (struct trace_file_writer *self);
302 /* Write the data of trace buffer without parsing. The content is
303 in BUF and length is LEN. */
304 void (*write_trace_buffer) (struct trace_file_writer *self,
305 gdb_byte *buf, LONGEST len);
307 /* Operations to write trace frames. The user of this field is
308 responsible to parse the data of trace buffer. Either field
309 'write_trace_buffer' or field ' frame_ops' is NULL. */
310 const struct trace_frame_write_ops *frame_ops;
312 /* The end of writing trace buffers. */
313 void (*end) (struct trace_file_writer *self);
316 /* Trace file writer for a given format. */
318 struct trace_file_writer
320 const struct trace_file_write_ops *ops;
323 extern void parse_static_tracepoint_marker_definition
324 (char *line, char **pp,
325 struct static_tracepoint_marker *marker);
326 extern void release_static_tracepoint_marker (struct static_tracepoint_marker *);
327 extern void free_current_marker (void *arg);
329 /* A hook used to notify the UI of tracepoint operations. */
331 extern void (*deprecated_trace_find_hook) (char *arg, int from_tty);
332 extern void (*deprecated_trace_start_stop_hook) (int start, int from_tty);
334 /* Returns the current traceframe number. */
335 extern int get_traceframe_number (void);
337 /* Returns the tracepoint number for current traceframe. */
338 extern int get_tracepoint_number (void);
340 /* Make the traceframe NUM be the current GDB trace frame number, and
341 do nothing more. In particular, this does not flush the
342 register/frame caches or notify the target about the trace frame
343 change, so that is can be used when we need to momentarily access
344 live memory. Targets lazily switch their current traceframe to
345 match GDB's traceframe number, at the appropriate times. */
346 extern void set_traceframe_number (int);
348 /* Make the traceframe NUM be the current trace frame, all the way to
349 the target, and flushes all global state (register/frame caches,
351 extern void set_current_traceframe (int num);
353 struct cleanup *make_cleanup_restore_current_traceframe (void);
354 struct cleanup *make_cleanup_restore_traceframe_number (void);
356 void free_actions (struct breakpoint *);
358 extern const char *decode_agent_options (const char *exp, int *trace_string);
360 extern void encode_actions (struct breakpoint *t, struct bp_location *tloc,
361 char ***tdp_actions, char ***stepping_actions);
363 extern void validate_actionline (const char *, struct breakpoint *);
364 extern void validate_trace_state_variable_name (const char *name);
366 extern struct trace_state_variable *find_trace_state_variable (const char *name);
367 extern struct trace_state_variable *create_trace_state_variable (const char *name);
369 extern int encode_source_string (int num, ULONGEST addr,
370 char *srctype, char *src,
371 char *buf, int buf_size);
373 extern void parse_trace_status (char *line, struct trace_status *ts);
375 extern void parse_tracepoint_status (char *p, struct breakpoint *tp,
376 struct uploaded_tp *utp);
378 extern void parse_tracepoint_definition (char *line,
379 struct uploaded_tp **utpp);
380 extern void parse_tsv_definition (char *line, struct uploaded_tsv **utsvp);
382 extern struct uploaded_tp *get_uploaded_tp (int num, ULONGEST addr,
383 struct uploaded_tp **utpp);
384 extern struct uploaded_tsv *get_uploaded_tsv (int num,
385 struct uploaded_tsv **utsvp);
386 extern struct tracepoint *create_tracepoint_from_upload (struct uploaded_tp *utp);
387 extern void merge_uploaded_tracepoints (struct uploaded_tp **utpp);
388 extern void merge_uploaded_trace_state_variables (struct uploaded_tsv **utsvp);
390 extern void disconnect_tracing (int from_tty);
392 extern void start_tracing (char *notes);
393 extern void stop_tracing (char *notes);
395 extern void trace_status_mi (int on_stop);
397 extern void tvariables_info_1 (void);
398 extern void save_trace_state_variables (struct ui_file *fp);
400 extern void tfind_1 (enum trace_find_type type, int num,
401 CORE_ADDR addr1, CORE_ADDR addr2,
404 extern void trace_save_tfile (const char *filename,
405 int target_does_save);
406 extern void trace_save_ctf (const char *dirname,
407 int target_does_save);
409 extern struct traceframe_info *parse_traceframe_info (const char *tframe_info);
411 extern int traceframe_available_memory (VEC(mem_range_s) **result,
412 CORE_ADDR memaddr, ULONGEST len);
414 #endif /* TRACEPOINT_H */