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02d27625 MM |
1 | /* Branch trace support for GDB, the GNU debugger. |
2 | ||
61baf725 | 3 | Copyright (C) 2013-2017 Free Software Foundation, Inc. |
02d27625 MM |
4 | |
5 | Contributed by Intel Corp. <markus.t.metzger@intel.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 | #ifndef BTRACE_H | |
23 | #define BTRACE_H | |
24 | ||
25 | /* Branch tracing (btrace) is a per-thread control-flow execution trace of the | |
26 | inferior. For presentation purposes, the branch trace is represented as a | |
27 | list of sequential control-flow blocks, one such list per thread. */ | |
28 | ||
29 | #include "btrace-common.h" | |
9e8915c6 | 30 | #include "target/waitstatus.h" /* For enum target_stop_reason. */ |
8d297bbf | 31 | #include "common/enum-flags.h" |
02d27625 | 32 | |
b20a6524 MM |
33 | #if defined (HAVE_LIBIPT) |
34 | # include <intel-pt.h> | |
35 | #endif | |
36 | ||
2b51eddc TW |
37 | #include <vector> |
38 | ||
02d27625 | 39 | struct thread_info; |
23a7fe75 | 40 | struct btrace_function; |
02d27625 | 41 | |
7d5c24b3 MM |
42 | /* A coarse instruction classification. */ |
43 | enum btrace_insn_class | |
44 | { | |
45 | /* The instruction is something not listed below. */ | |
46 | BTRACE_INSN_OTHER, | |
47 | ||
48 | /* The instruction is a function call. */ | |
49 | BTRACE_INSN_CALL, | |
50 | ||
51 | /* The instruction is a function return. */ | |
52 | BTRACE_INSN_RETURN, | |
53 | ||
54 | /* The instruction is an unconditional jump. */ | |
55 | BTRACE_INSN_JUMP | |
56 | }; | |
57 | ||
da8c46d2 MM |
58 | /* Instruction flags. */ |
59 | enum btrace_insn_flag | |
60 | { | |
61 | /* The instruction has been executed speculatively. */ | |
62 | BTRACE_INSN_FLAG_SPECULATIVE = (1 << 0) | |
63 | }; | |
8d297bbf | 64 | DEF_ENUM_FLAGS_TYPE (enum btrace_insn_flag, btrace_insn_flags); |
da8c46d2 | 65 | |
02d27625 MM |
66 | /* A branch trace instruction. |
67 | ||
68 | This represents a single instruction in a branch trace. */ | |
23a7fe75 | 69 | struct btrace_insn |
02d27625 MM |
70 | { |
71 | /* The address of this instruction. */ | |
72 | CORE_ADDR pc; | |
7d5c24b3 MM |
73 | |
74 | /* The size of this instruction in bytes. */ | |
75 | gdb_byte size; | |
76 | ||
77 | /* The instruction class of this instruction. */ | |
78 | enum btrace_insn_class iclass; | |
da8c46d2 MM |
79 | |
80 | /* A bit vector of BTRACE_INSN_FLAGS. */ | |
8d297bbf | 81 | btrace_insn_flags flags; |
02d27625 MM |
82 | }; |
83 | ||
23a7fe75 MM |
84 | /* A vector of branch trace instructions. */ |
85 | typedef struct btrace_insn btrace_insn_s; | |
86 | DEF_VEC_O (btrace_insn_s); | |
87 | ||
88 | /* A doubly-linked list of branch trace function segments. */ | |
89 | struct btrace_func_link | |
90 | { | |
91 | struct btrace_function *prev; | |
92 | struct btrace_function *next; | |
93 | }; | |
94 | ||
95 | /* Flags for btrace function segments. */ | |
96 | enum btrace_function_flag | |
97 | { | |
98 | /* The 'up' link interpretation. | |
99 | If set, it points to the function segment we returned to. | |
100 | If clear, it points to the function segment we called from. */ | |
101 | BFUN_UP_LINKS_TO_RET = (1 << 0), | |
102 | ||
103 | /* The 'up' link points to a tail call. This obviously only makes sense | |
104 | if bfun_up_links_to_ret is clear. */ | |
105 | BFUN_UP_LINKS_TO_TAILCALL = (1 << 1) | |
106 | }; | |
8d297bbf | 107 | DEF_ENUM_FLAGS_TYPE (enum btrace_function_flag, btrace_function_flags); |
23a7fe75 | 108 | |
31fd9caa MM |
109 | /* Decode errors for the BTS recording format. */ |
110 | enum btrace_bts_error | |
111 | { | |
112 | /* The instruction trace overflowed the end of the trace block. */ | |
113 | BDE_BTS_OVERFLOW = 1, | |
114 | ||
115 | /* The instruction size could not be determined. */ | |
116 | BDE_BTS_INSN_SIZE | |
117 | }; | |
118 | ||
bc504a31 | 119 | /* Decode errors for the Intel Processor Trace recording format. */ |
b20a6524 MM |
120 | enum btrace_pt_error |
121 | { | |
122 | /* The user cancelled trace processing. */ | |
123 | BDE_PT_USER_QUIT = 1, | |
124 | ||
125 | /* Tracing was temporarily disabled. */ | |
126 | BDE_PT_DISABLED, | |
127 | ||
128 | /* Trace recording overflowed. */ | |
129 | BDE_PT_OVERFLOW | |
130 | ||
131 | /* Negative numbers are used by the decoder library. */ | |
132 | }; | |
133 | ||
23a7fe75 | 134 | /* A branch trace function segment. |
02d27625 MM |
135 | |
136 | This represents a function segment in a branch trace, i.e. a consecutive | |
23a7fe75 MM |
137 | number of instructions belonging to the same function. |
138 | ||
31fd9caa MM |
139 | In case of decode errors, we add an empty function segment to indicate |
140 | the gap in the trace. | |
141 | ||
142 | We do not allow function segments without instructions otherwise. */ | |
23a7fe75 | 143 | struct btrace_function |
02d27625 | 144 | { |
23a7fe75 | 145 | /* The full and minimal symbol for the function. Both may be NULL. */ |
02d27625 MM |
146 | struct minimal_symbol *msym; |
147 | struct symbol *sym; | |
148 | ||
23a7fe75 MM |
149 | /* The previous and next segment belonging to the same function. |
150 | If a function calls another function, the former will have at least | |
151 | two segments: one before the call and another after the return. */ | |
152 | struct btrace_func_link segment; | |
153 | ||
154 | /* The previous and next function in control flow order. */ | |
155 | struct btrace_func_link flow; | |
156 | ||
157 | /* The directly preceding function segment in a (fake) call stack. */ | |
158 | struct btrace_function *up; | |
159 | ||
160 | /* The instructions in this function segment. | |
31fd9caa MM |
161 | The instruction vector will be empty if the function segment |
162 | represents a decode error. */ | |
23a7fe75 MM |
163 | VEC (btrace_insn_s) *insn; |
164 | ||
31fd9caa MM |
165 | /* The error code of a decode error that led to a gap. |
166 | Must be zero unless INSN is empty; non-zero otherwise. */ | |
167 | int errcode; | |
168 | ||
23a7fe75 | 169 | /* The instruction number offset for the first instruction in this |
31fd9caa MM |
170 | function segment. |
171 | If INSN is empty this is the insn_offset of the succeding function | |
172 | segment in control-flow order. */ | |
23a7fe75 MM |
173 | unsigned int insn_offset; |
174 | ||
31fd9caa MM |
175 | /* The function number in control-flow order. |
176 | If INSN is empty indicating a gap in the trace due to a decode error, | |
177 | we still count the gap as a function. */ | |
23a7fe75 MM |
178 | unsigned int number; |
179 | ||
180 | /* The function level in a back trace across the entire branch trace. | |
181 | A caller's level is one lower than the level of its callee. | |
182 | ||
183 | Levels can be negative if we see returns for which we have not seen | |
184 | the corresponding calls. The branch trace thread information provides | |
185 | a fixup to normalize function levels so the smallest level is zero. */ | |
186 | int level; | |
187 | ||
23a7fe75 | 188 | /* A bit-vector of btrace_function_flag. */ |
8d297bbf | 189 | btrace_function_flags flags; |
02d27625 MM |
190 | }; |
191 | ||
23a7fe75 MM |
192 | /* A branch trace instruction iterator. */ |
193 | struct btrace_insn_iterator | |
194 | { | |
195 | /* The branch trace function segment containing the instruction. | |
196 | Will never be NULL. */ | |
197 | const struct btrace_function *function; | |
02d27625 | 198 | |
23a7fe75 MM |
199 | /* The index into the function segment's instruction vector. */ |
200 | unsigned int index; | |
201 | }; | |
02d27625 | 202 | |
23a7fe75 MM |
203 | /* A branch trace function call iterator. */ |
204 | struct btrace_call_iterator | |
205 | { | |
206 | /* The branch trace information for this thread. Will never be NULL. */ | |
207 | const struct btrace_thread_info *btinfo; | |
208 | ||
209 | /* The branch trace function segment. | |
210 | This will be NULL for the iterator pointing to the end of the trace. */ | |
211 | const struct btrace_function *function; | |
212 | }; | |
02d27625 MM |
213 | |
214 | /* Branch trace iteration state for "record instruction-history". */ | |
23a7fe75 | 215 | struct btrace_insn_history |
02d27625 | 216 | { |
23a7fe75 MM |
217 | /* The branch trace instruction range from BEGIN (inclusive) to |
218 | END (exclusive) that has been covered last time. */ | |
219 | struct btrace_insn_iterator begin; | |
220 | struct btrace_insn_iterator end; | |
02d27625 MM |
221 | }; |
222 | ||
223 | /* Branch trace iteration state for "record function-call-history". */ | |
23a7fe75 | 224 | struct btrace_call_history |
02d27625 | 225 | { |
23a7fe75 MM |
226 | /* The branch trace function range from BEGIN (inclusive) to END (exclusive) |
227 | that has been covered last time. */ | |
228 | struct btrace_call_iterator begin; | |
229 | struct btrace_call_iterator end; | |
02d27625 MM |
230 | }; |
231 | ||
52834460 MM |
232 | /* Branch trace thread flags. */ |
233 | enum btrace_thread_flag | |
234 | { | |
235 | /* The thread is to be stepped forwards. */ | |
236 | BTHR_STEP = (1 << 0), | |
237 | ||
238 | /* The thread is to be stepped backwards. */ | |
239 | BTHR_RSTEP = (1 << 1), | |
240 | ||
241 | /* The thread is to be continued forwards. */ | |
242 | BTHR_CONT = (1 << 2), | |
243 | ||
244 | /* The thread is to be continued backwards. */ | |
245 | BTHR_RCONT = (1 << 3), | |
246 | ||
247 | /* The thread is to be moved. */ | |
6e4879f0 MM |
248 | BTHR_MOVE = (BTHR_STEP | BTHR_RSTEP | BTHR_CONT | BTHR_RCONT), |
249 | ||
250 | /* The thread is to be stopped. */ | |
251 | BTHR_STOP = (1 << 4) | |
52834460 | 252 | }; |
8d297bbf | 253 | DEF_ENUM_FLAGS_TYPE (enum btrace_thread_flag, btrace_thread_flags); |
52834460 | 254 | |
b0627500 MM |
255 | #if defined (HAVE_LIBIPT) |
256 | /* A packet. */ | |
257 | struct btrace_pt_packet | |
258 | { | |
259 | /* The offset in the trace stream. */ | |
260 | uint64_t offset; | |
261 | ||
262 | /* The decode error code. */ | |
263 | enum pt_error_code errcode; | |
264 | ||
265 | /* The decoded packet. Only valid if ERRCODE == pte_ok. */ | |
266 | struct pt_packet packet; | |
267 | }; | |
268 | ||
269 | /* Define functions operating on a vector of packets. */ | |
270 | typedef struct btrace_pt_packet btrace_pt_packet_s; | |
271 | DEF_VEC_O (btrace_pt_packet_s); | |
272 | #endif /* defined (HAVE_LIBIPT) */ | |
273 | ||
274 | /* Branch trace iteration state for "maintenance btrace packet-history". */ | |
275 | struct btrace_maint_packet_history | |
276 | { | |
277 | /* The branch trace packet range from BEGIN (inclusive) to | |
278 | END (exclusive) that has been covered last time. */ | |
279 | unsigned int begin; | |
280 | unsigned int end; | |
281 | }; | |
282 | ||
283 | /* Branch trace maintenance information per thread. | |
284 | ||
285 | This information is used by "maintenance btrace" commands. */ | |
286 | struct btrace_maint_info | |
287 | { | |
288 | /* Most information is format-specific. | |
289 | The format can be found in the BTRACE.DATA.FORMAT field of each thread. */ | |
290 | union | |
291 | { | |
292 | /* BTRACE.DATA.FORMAT == BTRACE_FORMAT_BTS */ | |
293 | struct | |
294 | { | |
295 | /* The packet history iterator. | |
296 | We are iterating over BTRACE.DATA.FORMAT.VARIANT.BTS.BLOCKS. */ | |
297 | struct btrace_maint_packet_history packet_history; | |
298 | } bts; | |
299 | ||
300 | #if defined (HAVE_LIBIPT) | |
301 | /* BTRACE.DATA.FORMAT == BTRACE_FORMAT_PT */ | |
302 | struct | |
303 | { | |
304 | /* A vector of decoded packets. */ | |
305 | VEC (btrace_pt_packet_s) *packets; | |
306 | ||
307 | /* The packet history iterator. | |
308 | We are iterating over the above PACKETS vector. */ | |
309 | struct btrace_maint_packet_history packet_history; | |
310 | } pt; | |
311 | #endif /* defined (HAVE_LIBIPT) */ | |
312 | } variant; | |
313 | }; | |
314 | ||
02d27625 MM |
315 | /* Branch trace information per thread. |
316 | ||
317 | This represents the branch trace configuration as well as the entry point | |
318 | into the branch trace data. For the latter, it also contains the index into | |
319 | an array of branch trace blocks used for iterating though the branch trace | |
320 | blocks of a thread. */ | |
321 | struct btrace_thread_info | |
322 | { | |
323 | /* The target branch trace information for this thread. | |
324 | ||
325 | This contains the branch trace configuration as well as any | |
326 | target-specific information necessary for implementing branch tracing on | |
327 | the underlying architecture. */ | |
328 | struct btrace_target_info *target; | |
329 | ||
9be54cae MM |
330 | /* The raw branch trace data for the below branch trace. */ |
331 | struct btrace_data data; | |
332 | ||
23a7fe75 MM |
333 | /* The current branch trace for this thread (both inclusive). |
334 | ||
335 | The last instruction of END is the current instruction, which is not | |
336 | part of the execution history. | |
337 | Both will be NULL if there is no branch trace available. If there is | |
338 | branch trace available, both will be non-NULL. */ | |
339 | struct btrace_function *begin; | |
340 | struct btrace_function *end; | |
341 | ||
fdd2bd92 TW |
342 | /* Vector of pointer to decoded function segments. These are in execution |
343 | order with the first element == BEGIN and the last element == END. */ | |
2b51eddc | 344 | std::vector<btrace_function *> functions; |
fdd2bd92 | 345 | |
23a7fe75 MM |
346 | /* The function level offset. When added to each function's LEVEL, |
347 | this normalizes the function levels such that the smallest level | |
348 | becomes zero. */ | |
349 | int level; | |
02d27625 | 350 | |
31fd9caa MM |
351 | /* The number of gaps in the trace. */ |
352 | unsigned int ngaps; | |
353 | ||
52834460 | 354 | /* A bit-vector of btrace_thread_flag. */ |
8d297bbf | 355 | btrace_thread_flags flags; |
52834460 | 356 | |
02d27625 | 357 | /* The instruction history iterator. */ |
23a7fe75 | 358 | struct btrace_insn_history *insn_history; |
02d27625 MM |
359 | |
360 | /* The function call history iterator. */ | |
23a7fe75 | 361 | struct btrace_call_history *call_history; |
07bbe694 | 362 | |
31fd9caa MM |
363 | /* The current replay position. NULL if not replaying. |
364 | Gaps are skipped during replay, so REPLAY always points to a valid | |
365 | instruction. */ | |
07bbe694 | 366 | struct btrace_insn_iterator *replay; |
9e8915c6 PA |
367 | |
368 | /* Why the thread stopped, if we need to track it. */ | |
369 | enum target_stop_reason stop_reason; | |
b0627500 MM |
370 | |
371 | /* Maintenance information. */ | |
372 | struct btrace_maint_info maint; | |
02d27625 MM |
373 | }; |
374 | ||
375 | /* Enable branch tracing for a thread. */ | |
f4abbc16 MM |
376 | extern void btrace_enable (struct thread_info *tp, |
377 | const struct btrace_config *conf); | |
378 | ||
379 | /* Get the branch trace configuration for a thread. | |
380 | Return NULL if branch tracing is not enabled for that thread. */ | |
381 | extern const struct btrace_config * | |
382 | btrace_conf (const struct btrace_thread_info *); | |
02d27625 MM |
383 | |
384 | /* Disable branch tracing for a thread. | |
385 | This will also delete the current branch trace data. */ | |
386 | extern void btrace_disable (struct thread_info *); | |
387 | ||
388 | /* Disable branch tracing for a thread during teardown. | |
389 | This is similar to btrace_disable, except that it will use | |
390 | target_teardown_btrace instead of target_disable_btrace. */ | |
391 | extern void btrace_teardown (struct thread_info *); | |
392 | ||
508352a9 TW |
393 | /* Return a human readable error string for the given ERRCODE in FORMAT. |
394 | The pointer will never be NULL and must not be freed. */ | |
395 | ||
396 | extern const char *btrace_decode_error (enum btrace_format format, int errcode); | |
397 | ||
02d27625 MM |
398 | /* Fetch the branch trace for a single thread. */ |
399 | extern void btrace_fetch (struct thread_info *); | |
400 | ||
401 | /* Clear the branch trace for a single thread. */ | |
402 | extern void btrace_clear (struct thread_info *); | |
403 | ||
404 | /* Clear the branch trace for all threads when an object file goes away. */ | |
405 | extern void btrace_free_objfile (struct objfile *); | |
406 | ||
734b0e4b MM |
407 | /* Parse a branch trace xml document XML into DATA. */ |
408 | extern void parse_xml_btrace (struct btrace_data *data, const char *xml); | |
c12a2917 | 409 | |
f4abbc16 MM |
410 | /* Parse a branch trace configuration xml document XML into CONF. */ |
411 | extern void parse_xml_btrace_conf (struct btrace_config *conf, const char *xml); | |
412 | ||
23a7fe75 | 413 | /* Dereference a branch trace instruction iterator. Return a pointer to the |
31fd9caa MM |
414 | instruction the iterator points to. |
415 | May return NULL if the iterator points to a gap in the trace. */ | |
23a7fe75 MM |
416 | extern const struct btrace_insn * |
417 | btrace_insn_get (const struct btrace_insn_iterator *); | |
418 | ||
69090cee TW |
419 | /* Return the error code for a branch trace instruction iterator. Returns zero |
420 | if there is no error, i.e. the instruction is valid. */ | |
421 | extern int btrace_insn_get_error (const struct btrace_insn_iterator *); | |
422 | ||
23a7fe75 | 423 | /* Return the instruction number for a branch trace iterator. |
69090cee | 424 | Returns one past the maximum instruction number for the end iterator. */ |
23a7fe75 MM |
425 | extern unsigned int btrace_insn_number (const struct btrace_insn_iterator *); |
426 | ||
427 | /* Initialize a branch trace instruction iterator to point to the begin/end of | |
428 | the branch trace. Throws an error if there is no branch trace. */ | |
429 | extern void btrace_insn_begin (struct btrace_insn_iterator *, | |
430 | const struct btrace_thread_info *); | |
431 | extern void btrace_insn_end (struct btrace_insn_iterator *, | |
432 | const struct btrace_thread_info *); | |
433 | ||
434 | /* Increment/decrement a branch trace instruction iterator by at most STRIDE | |
435 | instructions. Return the number of instructions by which the instruction | |
436 | iterator has been advanced. | |
437 | Returns zero, if the operation failed or STRIDE had been zero. */ | |
438 | extern unsigned int btrace_insn_next (struct btrace_insn_iterator *, | |
439 | unsigned int stride); | |
440 | extern unsigned int btrace_insn_prev (struct btrace_insn_iterator *, | |
441 | unsigned int stride); | |
442 | ||
443 | /* Compare two branch trace instruction iterators. | |
444 | Return a negative number if LHS < RHS. | |
445 | Return zero if LHS == RHS. | |
446 | Return a positive number if LHS > RHS. */ | |
447 | extern int btrace_insn_cmp (const struct btrace_insn_iterator *lhs, | |
448 | const struct btrace_insn_iterator *rhs); | |
449 | ||
69090cee | 450 | /* Find an instruction or gap in the function branch trace by its number. |
23a7fe75 MM |
451 | If the instruction is found, initialize the branch trace instruction |
452 | iterator to point to this instruction and return non-zero. | |
453 | Return zero otherwise. */ | |
454 | extern int btrace_find_insn_by_number (struct btrace_insn_iterator *, | |
455 | const struct btrace_thread_info *, | |
456 | unsigned int number); | |
457 | ||
458 | /* Dereference a branch trace call iterator. Return a pointer to the | |
459 | function the iterator points to or NULL if the interator points past | |
460 | the end of the branch trace. */ | |
461 | extern const struct btrace_function * | |
462 | btrace_call_get (const struct btrace_call_iterator *); | |
463 | ||
464 | /* Return the function number for a branch trace call iterator. | |
465 | Returns one past the maximum function number for the end iterator. | |
466 | Returns zero if the iterator does not point to a valid function. */ | |
467 | extern unsigned int btrace_call_number (const struct btrace_call_iterator *); | |
468 | ||
469 | /* Initialize a branch trace call iterator to point to the begin/end of | |
470 | the branch trace. Throws an error if there is no branch trace. */ | |
471 | extern void btrace_call_begin (struct btrace_call_iterator *, | |
472 | const struct btrace_thread_info *); | |
473 | extern void btrace_call_end (struct btrace_call_iterator *, | |
474 | const struct btrace_thread_info *); | |
475 | ||
476 | /* Increment/decrement a branch trace call iterator by at most STRIDE function | |
477 | segments. Return the number of function segments by which the call | |
478 | iterator has been advanced. | |
479 | Returns zero, if the operation failed or STRIDE had been zero. */ | |
480 | extern unsigned int btrace_call_next (struct btrace_call_iterator *, | |
481 | unsigned int stride); | |
482 | extern unsigned int btrace_call_prev (struct btrace_call_iterator *, | |
483 | unsigned int stride); | |
484 | ||
485 | /* Compare two branch trace call iterators. | |
486 | Return a negative number if LHS < RHS. | |
487 | Return zero if LHS == RHS. | |
488 | Return a positive number if LHS > RHS. */ | |
489 | extern int btrace_call_cmp (const struct btrace_call_iterator *lhs, | |
490 | const struct btrace_call_iterator *rhs); | |
491 | ||
492 | /* Find a function in the function branch trace by its NUMBER. | |
493 | If the function is found, initialize the branch trace call | |
494 | iterator to point to this function and return non-zero. | |
495 | Return zero otherwise. */ | |
496 | extern int btrace_find_call_by_number (struct btrace_call_iterator *, | |
497 | const struct btrace_thread_info *, | |
498 | unsigned int number); | |
499 | ||
500 | /* Set the branch trace instruction history from BEGIN (inclusive) to | |
501 | END (exclusive). */ | |
502 | extern void btrace_set_insn_history (struct btrace_thread_info *, | |
503 | const struct btrace_insn_iterator *begin, | |
504 | const struct btrace_insn_iterator *end); | |
505 | ||
506 | /* Set the branch trace function call history from BEGIN (inclusive) to | |
507 | END (exclusive). */ | |
508 | extern void btrace_set_call_history (struct btrace_thread_info *, | |
509 | const struct btrace_call_iterator *begin, | |
510 | const struct btrace_call_iterator *end); | |
511 | ||
07bbe694 MM |
512 | /* Determine if branch tracing is currently replaying TP. */ |
513 | extern int btrace_is_replaying (struct thread_info *tp); | |
514 | ||
6e07b1d2 MM |
515 | /* Return non-zero if the branch trace for TP is empty; zero otherwise. */ |
516 | extern int btrace_is_empty (struct thread_info *tp); | |
517 | ||
734b0e4b MM |
518 | /* Create a cleanup for DATA. */ |
519 | extern struct cleanup *make_cleanup_btrace_data (struct btrace_data *data); | |
6e07b1d2 | 520 | |
02d27625 | 521 | #endif /* BTRACE_H */ |