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;
34 /* Collected trace state variables. */
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
45 struct trace_state_variable
47 /* The variable's name. The user has to prefix with a dollar sign,
48 but we don't store that internally. */
51 /* An id number assigned by GDB, and transmitted to targets. */
54 /* The initial value of a variable is a 64-bit signed integer. */
55 LONGEST initial_value;
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. */
62 /* The value of a variable is a 64-bit signed integer. */
65 /* This is true for variables that are predefined and built into
70 /* The trace status encompasses various info about the general state
71 of the tracing run. */
73 enum trace_stop_reason
75 trace_stop_reason_unknown,
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. */
90 /* This is true if the value of the running field is known. */
93 /* This is true when the trace experiment is actually running. */
96 enum trace_stop_reason stop_reason;
98 /* If stop_reason is tracepoint_passcount or tracepoint_error, this
99 is the (on-target) number of the tracepoint which caused the
101 int stopping_tracepoint;
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
109 /* Number of traceframes currently in the buffer. */
111 int traceframe_count;
113 /* Number of traceframes created since start of run. */
115 int traceframes_created;
117 /* Total size of the target's trace buffer. */
121 /* Unused bytes left in the target's trace buffer. */
125 /* 1 if the target will continue tracing after disconnection, else
126 0. If the target does not report a value, assume 0. */
128 int disconnected_tracing;
130 /* 1 if the target is using a circular trace buffer, else 0. If the
131 target does not report a value, assume 0. */
135 /* The "name" of the person running the trace. This is an
140 /* "Notes" about the trace. This is an arbitrary string not
141 interpreted by GDBserver in any special way. */
145 /* The calendar times at which the trace run started and stopped,
146 both expressed in microseconds of Unix time. */
152 struct trace_status *current_trace_status (void);
154 extern char *default_collect;
156 extern int trace_regblock_size;
158 /* Struct to collect random info about tracepoints on the target. */
170 /* String that is the encoded form of the tracepoint's condition. */
173 /* Vectors of strings that are the encoded forms of a tracepoint's
175 VEC(char_ptr) *actions;
176 VEC(char_ptr) *step_actions;
178 /* The original string defining the location of the tracepoint. */
181 /* The original string defining the tracepoint's condition. */
184 /* List of original strings defining the tracepoint's actions. */
185 VEC(char_ptr) *cmd_strings;
187 /* The tracepoint's current hit count. */
190 /* The tracepoint's current traceframe usage. */
191 ULONGEST traceframe_usage;
193 struct uploaded_tp *next;
196 /* Struct recording info about trace state variables on the target. */
202 LONGEST initial_value;
204 struct uploaded_tsv *next;
207 /* Struct recording info about a target static tracepoint marker. */
209 struct static_tracepoint_marker
211 struct gdbarch *gdbarch;
214 /* The string ID of the marker. */
217 /* Extra target reported info associated with the marker. */
221 struct trace_file_writer;
223 /* Operations to write trace frames to a specific trace format. */
225 struct trace_frame_write_ops
227 /* Write a new trace frame. The tracepoint number of this trace
229 void (*start) (struct trace_file_writer *self, uint16_t tpnum);
231 /* Write an 'R' block. Buffer BUF contains its contents and SIZE is
233 void (*write_r_block) (struct trace_file_writer *self,
234 gdb_byte *buf, int32_t size);
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'
252 void (*write_m_block_memory) (struct trace_file_writer *self,
253 gdb_byte *buf, uint16_t length);
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,
260 /* The end of the trace frame. */
261 void (*end) (struct trace_file_writer *self);
264 /* Operations to write trace buffers to a specific trace format. */
266 struct trace_file_write_ops
268 /* Destructor. Releases everything from SELF (but not SELF
270 void (*dtor) (struct trace_file_writer *self);
272 /* Save the data to file or directory NAME of desired format in
273 target side. Return true for success, otherwise return
275 int (*target_save) (struct trace_file_writer *self,
278 /* Write the trace buffers to file or directory NAME. */
279 void (*start) (struct trace_file_writer *self,
282 /* Write the trace header. */
283 void (*write_header) (struct trace_file_writer *self);
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,
290 /* Write trace status TS. */
291 void (*write_status) (struct trace_file_writer *self,
292 struct trace_status *ts);
294 /* Write the uploaded TSV. */
295 void (*write_uploaded_tsv) (struct trace_file_writer *self,
296 struct uploaded_tsv *tsv);
298 /* Write the uploaded tracepoint TP. */
299 void (*write_uploaded_tp) (struct trace_file_writer *self,
300 struct uploaded_tp *tp);
302 /* Write to mark the end of the definition part. */
303 void (*write_definition_end) (struct trace_file_writer *self);
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);
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;
315 /* The end of writing trace buffers. */
316 void (*end) (struct trace_file_writer *self);
319 /* Trace file writer for a given format. */
321 struct trace_file_writer
323 const struct trace_file_write_ops *ops;
326 extern void parse_static_tracepoint_marker_definition
327 (char *line, char **pp,
328 struct static_tracepoint_marker *marker);
329 extern void release_static_tracepoint_marker (struct static_tracepoint_marker *);
330 extern void free_current_marker (void *arg);
332 /* A hook used to notify the UI of tracepoint operations. */
334 extern void (*deprecated_trace_find_hook) (char *arg, int from_tty);
335 extern void (*deprecated_trace_start_stop_hook) (int start, int from_tty);
337 /* Returns the current traceframe number. */
338 extern int get_traceframe_number (void);
340 /* Returns the tracepoint number for current traceframe. */
341 extern int get_tracepoint_number (void);
343 /* Make the traceframe NUM be the current GDB trace frame number, and
344 do nothing more. In particular, this does not flush the
345 register/frame caches or notify the target about the trace frame
346 change, so that is can be used when we need to momentarily access
347 live memory. Targets lazily switch their current traceframe to
348 match GDB's traceframe number, at the appropriate times. */
349 extern void set_traceframe_number (int);
351 /* Make the traceframe NUM be the current trace frame, all the way to
352 the target, and flushes all global state (register/frame caches,
354 extern void set_current_traceframe (int num);
356 struct cleanup *make_cleanup_restore_current_traceframe (void);
357 struct cleanup *make_cleanup_restore_traceframe_number (void);
359 void free_actions (struct breakpoint *);
361 extern const char *decode_agent_options (const char *exp, int *trace_string);
363 extern void encode_actions (struct bp_location *tloc,
364 char ***tdp_actions, char ***stepping_actions);
366 extern void validate_actionline (const char *, struct breakpoint *);
367 extern void validate_trace_state_variable_name (const char *name);
369 extern struct trace_state_variable *find_trace_state_variable (const char *name);
370 extern struct trace_state_variable *create_trace_state_variable (const char *name);
372 extern int encode_source_string (int num, ULONGEST addr,
373 char *srctype, char *src,
374 char *buf, int buf_size);
376 extern void parse_trace_status (char *line, struct trace_status *ts);
378 extern void parse_tracepoint_status (char *p, struct breakpoint *tp,
379 struct uploaded_tp *utp);
381 extern void parse_tracepoint_definition (char *line,
382 struct uploaded_tp **utpp);
383 extern void parse_tsv_definition (char *line, struct uploaded_tsv **utsvp);
385 extern struct uploaded_tp *get_uploaded_tp (int num, ULONGEST addr,
386 struct uploaded_tp **utpp);
387 extern struct uploaded_tsv *get_uploaded_tsv (int num,
388 struct uploaded_tsv **utsvp);
389 extern struct tracepoint *create_tracepoint_from_upload (struct uploaded_tp *utp);
390 extern void merge_uploaded_tracepoints (struct uploaded_tp **utpp);
391 extern void merge_uploaded_trace_state_variables (struct uploaded_tsv **utsvp);
393 extern void query_if_trace_running (int from_tty);
394 extern void disconnect_tracing (void);
395 extern void trace_reset_local_state (void);
397 extern void start_tracing (char *notes);
398 extern void stop_tracing (char *notes);
400 extern void trace_status_mi (int on_stop);
402 extern void tvariables_info_1 (void);
403 extern void save_trace_state_variables (struct ui_file *fp);
405 extern void tfind_1 (enum trace_find_type type, int num,
406 CORE_ADDR addr1, CORE_ADDR addr2,
409 extern void trace_save_tfile (const char *filename,
410 int target_does_save);
411 extern void trace_save_ctf (const char *dirname,
412 int target_does_save);
414 extern struct traceframe_info *parse_traceframe_info (const char *tframe_info);
416 extern int traceframe_available_memory (VEC(mem_range_s) **result,
417 CORE_ADDR memaddr, ULONGEST len);
419 #endif /* TRACEPOINT_H */