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 /* A trace state variable is a value managed by a target being
28 traced. A trace state variable (or tsv for short) can be accessed
29 and assigned to by tracepoint actions and conditionals, but is not
30 part of the program being traced, and it doesn't have to be
31 collected. Effectively the variables are scratch space for
34 struct trace_state_variable
36 /* The variable's name. The user has to prefix with a dollar sign,
37 but we don't store that internally. */
40 /* An id number assigned by GDB, and transmitted to targets. */
43 /* The initial value of a variable is a 64-bit signed integer. */
44 LONGEST initial_value;
46 /* 1 if the value is known, else 0. The value is known during a
47 trace run, or in tfind mode if the variable was collected into
48 the current trace frame. */
51 /* The value of a variable is a 64-bit signed integer. */
54 /* This is true for variables that are predefined and built into
59 /* The trace status encompasses various info about the general state
60 of the tracing run. */
62 enum trace_stop_reason
64 trace_stop_reason_unknown,
75 /* If the status is coming from a file rather than a live target,
76 this points at the file's filename. Otherwise, this is NULL. */
79 /* This is true if the value of the running field is known. */
82 /* This is true when the trace experiment is actually running. */
85 enum trace_stop_reason stop_reason;
87 /* If stop_reason is tracepoint_passcount or tracepoint_error, this
88 is the (on-target) number of the tracepoint which caused the
90 int stopping_tracepoint;
92 /* If stop_reason is tstop_command or tracepoint_error, this is an
93 arbitrary string that may describe the reason for the stop in
98 /* Number of traceframes currently in the buffer. */
100 int traceframe_count;
102 /* Number of traceframes created since start of run. */
104 int traceframes_created;
106 /* Total size of the target's trace buffer. */
110 /* Unused bytes left in the target's trace buffer. */
114 /* 1 if the target will continue tracing after disconnection, else
115 0. If the target does not report a value, assume 0. */
117 int disconnected_tracing;
119 /* 1 if the target is using a circular trace buffer, else 0. If the
120 target does not report a value, assume 0. */
124 /* The "name" of the person running the trace. This is an
129 /* "Notes" about the trace. This is an arbitrary string not
130 interpreted by GDBserver in any special way. */
134 /* The calendar times at which the trace run started and stopped,
135 both expressed in microseconds of Unix time. */
141 struct trace_status *current_trace_status (void);
143 extern char *default_collect;
145 /* Struct to collect random info about tracepoints on the target. */
157 /* String that is the encoded form of the tracepoint's condition. */
160 /* Vectors of strings that are the encoded forms of a tracepoint's
162 VEC(char_ptr) *actions;
163 VEC(char_ptr) *step_actions;
165 /* The original string defining the location of the tracepoint. */
168 /* The original string defining the tracepoint's condition. */
171 /* List of original strings defining the tracepoint's actions. */
172 VEC(char_ptr) *cmd_strings;
174 /* The tracepoint's current hit count. */
177 /* The tracepoint's current traceframe usage. */
178 ULONGEST traceframe_usage;
180 struct uploaded_tp *next;
183 /* Struct recording info about trace state variables on the target. */
189 LONGEST initial_value;
191 struct uploaded_tsv *next;
194 /* Struct recording info about a target static tracepoint marker. */
196 struct static_tracepoint_marker
198 struct gdbarch *gdbarch;
201 /* The string ID of the marker. */
204 /* Extra target reported info associated with the marker. */
208 struct trace_file_writer;
210 /* Operations to write trace frames to a specific trace format. */
212 struct trace_frame_write_ops
214 /* Write a new trace frame. The tracepoint number of this trace
216 void (*start) (struct trace_file_writer *self, uint16_t tpnum);
218 /* Write an 'R' block. Buffer BUF contains its contents and SIZE is
220 void (*write_r_block) (struct trace_file_writer *self,
221 gdb_byte *buf, int32_t size);
223 /* Write an 'M' block, the header and memory contents respectively.
224 The header of 'M' block is composed of the start address and the
225 length of memory collection, and the memory contents contain
226 the collected memory contents in tracing.
227 For extremely large M block, GDB is unable to get its contents
228 and write them into trace file in one go, due to the limitation
229 of the remote target or the size of internal buffer, we split
230 the operation to 'M' block to two operations. */
231 /* Write the head of 'M' block. ADDR is the start address of
232 collected memory and LENGTH is the length of memory contents. */
233 void (*write_m_block_header) (struct trace_file_writer *self,
234 uint64_t addr, uint16_t length);
235 /* Write the memory contents of 'M' block. Buffer BUF contains
236 its contents and LENGTH is its length. This method can be called
237 multiple times to write large memory contents of a single 'M'
239 void (*write_m_block_memory) (struct trace_file_writer *self,
240 gdb_byte *buf, uint16_t length);
242 /* Write a 'V' block. NUM is the trace variable number and VAL is
243 the value of the trace variable. */
244 void (*write_v_block) (struct trace_file_writer *self, int32_t num,
247 /* The end of the trace frame. */
248 void (*end) (struct trace_file_writer *self);
251 /* Operations to write trace buffers to a specific trace format. */
253 struct trace_file_write_ops
255 /* Destructor. Releases everything from SELF (but not SELF
257 void (*dtor) (struct trace_file_writer *self);
259 /* Save the data to file or directory NAME of desired format in
260 target side. Return true for success, otherwise return
262 int (*target_save) (struct trace_file_writer *self,
265 /* Write the trace buffers to file or directory NAME. */
266 void (*start) (struct trace_file_writer *self,
269 /* Write the trace header. */
270 void (*write_header) (struct trace_file_writer *self);
272 /* Write the type of block about registers. SIZE is the size of
273 all registers on the target. */
274 void (*write_regblock_type) (struct trace_file_writer *self,
277 /* Write trace status TS. */
278 void (*write_status) (struct trace_file_writer *self,
279 struct trace_status *ts);
281 /* Write the uploaded TSV. */
282 void (*write_uploaded_tsv) (struct trace_file_writer *self,
283 struct uploaded_tsv *tsv);
285 /* Write the uploaded tracepoint TP. */
286 void (*write_uploaded_tp) (struct trace_file_writer *self,
287 struct uploaded_tp *tp);
289 /* Write to mark the end of the definition part. */
290 void (*write_definition_end) (struct trace_file_writer *self);
292 /* Write the data of trace buffer without parsing. The content is
293 in BUF and length is LEN. */
294 void (*write_trace_buffer) (struct trace_file_writer *self,
295 gdb_byte *buf, LONGEST len);
297 /* Operations to write trace frames. The user of this field is
298 responsible to parse the data of trace buffer. Either field
299 'write_trace_buffer' or field ' frame_ops' is NULL. */
300 const struct trace_frame_write_ops *frame_ops;
302 /* The end of writing trace buffers. */
303 void (*end) (struct trace_file_writer *self);
306 /* Trace file writer for a given format. */
308 struct trace_file_writer
310 const struct trace_file_write_ops *ops;
313 extern void parse_static_tracepoint_marker_definition
314 (char *line, char **pp,
315 struct static_tracepoint_marker *marker);
316 extern void release_static_tracepoint_marker (struct static_tracepoint_marker *);
317 extern void free_current_marker (void *arg);
319 /* A hook used to notify the UI of tracepoint operations. */
321 extern void (*deprecated_trace_find_hook) (char *arg, int from_tty);
322 extern void (*deprecated_trace_start_stop_hook) (int start, int from_tty);
324 /* Returns the current traceframe number. */
325 extern int get_traceframe_number (void);
327 /* Make the traceframe NUM be the current GDB trace frame number, and
328 do nothing more. In particular, this does not flush the
329 register/frame caches or notify the target about the trace frame
330 change, so that is can be used when we need to momentarily access
331 live memory. Targets lazily switch their current traceframe to
332 match GDB's traceframe number, at the appropriate times. */
333 extern void set_traceframe_number (int);
335 /* Make the traceframe NUM be the current trace frame, all the way to
336 the target, and flushes all global state (register/frame caches,
338 extern void set_current_traceframe (int num);
340 struct cleanup *make_cleanup_restore_current_traceframe (void);
341 struct cleanup *make_cleanup_restore_traceframe_number (void);
343 void free_actions (struct breakpoint *);
345 extern const char *decode_agent_options (const char *exp);
347 extern void encode_actions (struct breakpoint *t, struct bp_location *tloc,
348 char ***tdp_actions, char ***stepping_actions);
350 extern void validate_actionline (const char *, struct breakpoint *);
351 extern void validate_trace_state_variable_name (const char *name);
353 extern struct trace_state_variable *find_trace_state_variable (const char *name);
354 extern struct trace_state_variable *create_trace_state_variable (const char *name);
356 extern int encode_source_string (int num, ULONGEST addr,
357 char *srctype, char *src,
358 char *buf, int buf_size);
360 extern void parse_trace_status (char *line, struct trace_status *ts);
362 extern void parse_tracepoint_status (char *p, struct breakpoint *tp,
363 struct uploaded_tp *utp);
365 extern void parse_tracepoint_definition (char *line,
366 struct uploaded_tp **utpp);
367 extern void parse_tsv_definition (char *line, struct uploaded_tsv **utsvp);
369 extern struct uploaded_tp *get_uploaded_tp (int num, ULONGEST addr,
370 struct uploaded_tp **utpp);
371 extern struct tracepoint *create_tracepoint_from_upload (struct uploaded_tp *utp);
372 extern void merge_uploaded_tracepoints (struct uploaded_tp **utpp);
373 extern void merge_uploaded_trace_state_variables (struct uploaded_tsv **utsvp);
375 extern void disconnect_tracing (int from_tty);
377 extern void start_tracing (char *notes);
378 extern void stop_tracing (char *notes);
380 extern void trace_status_mi (int on_stop);
382 extern void tvariables_info_1 (void);
383 extern void save_trace_state_variables (struct ui_file *fp);
385 extern void tfind_1 (enum trace_find_type type, int num,
386 ULONGEST addr1, ULONGEST addr2,
389 extern void trace_save_tfile (const char *filename,
390 int target_does_save);
391 extern void trace_save_ctf (const char *dirname,
392 int target_does_save);
394 extern struct traceframe_info *parse_traceframe_info (const char *tframe_info);
396 extern int traceframe_available_memory (VEC(mem_range_s) **result,
397 CORE_ADDR memaddr, ULONGEST len);
399 #endif /* TRACEPOINT_H */