1 /* Branch trace support for GDB, the GNU debugger.
3 Copyright (C) 2013-2015 Free Software Foundation, Inc.
5 Contributed by Intel Corp. <markus.t.metzger@intel.com>
7 This file is part of GDB.
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.
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.
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/>. */
24 #include "gdbthread.h"
31 #include "filenames.h"
32 #include "xml-support.h"
36 #include "cli/cli-utils.h"
41 /* Command lists for btrace maintenance commands. */
42 static struct cmd_list_element
*maint_btrace_cmdlist
;
43 static struct cmd_list_element
*maint_btrace_set_cmdlist
;
44 static struct cmd_list_element
*maint_btrace_show_cmdlist
;
45 static struct cmd_list_element
*maint_btrace_pt_set_cmdlist
;
46 static struct cmd_list_element
*maint_btrace_pt_show_cmdlist
;
48 /* Control whether to skip PAD packets when computing the packet history. */
49 static int maint_btrace_pt_skip_pad
= 1;
51 static void btrace_add_pc (struct thread_info
*tp
);
53 /* Print a record debug message. Use do ... while (0) to avoid ambiguities
54 when used in if statements. */
56 #define DEBUG(msg, args...) \
59 if (record_debug != 0) \
60 fprintf_unfiltered (gdb_stdlog, \
61 "[btrace] " msg "\n", ##args); \
65 #define DEBUG_FTRACE(msg, args...) DEBUG ("[ftrace] " msg, ##args)
67 /* Return the function name of a recorded function segment for printing.
68 This function never returns NULL. */
71 ftrace_print_function_name (const struct btrace_function
*bfun
)
73 struct minimal_symbol
*msym
;
80 return SYMBOL_PRINT_NAME (sym
);
83 return MSYMBOL_PRINT_NAME (msym
);
88 /* Return the file name of a recorded function segment for printing.
89 This function never returns NULL. */
92 ftrace_print_filename (const struct btrace_function
*bfun
)
100 filename
= symtab_to_filename_for_display (symbol_symtab (sym
));
102 filename
= "<unknown>";
107 /* Return a string representation of the address of an instruction.
108 This function never returns NULL. */
111 ftrace_print_insn_addr (const struct btrace_insn
*insn
)
116 return core_addr_to_string_nz (insn
->pc
);
119 /* Print an ftrace debug status message. */
122 ftrace_debug (const struct btrace_function
*bfun
, const char *prefix
)
124 const char *fun
, *file
;
125 unsigned int ibegin
, iend
;
128 fun
= ftrace_print_function_name (bfun
);
129 file
= ftrace_print_filename (bfun
);
132 ibegin
= bfun
->insn_offset
;
133 iend
= ibegin
+ VEC_length (btrace_insn_s
, bfun
->insn
);
135 DEBUG_FTRACE ("%s: fun = %s, file = %s, level = %d, insn = [%u; %u)",
136 prefix
, fun
, file
, level
, ibegin
, iend
);
139 /* Return non-zero if BFUN does not match MFUN and FUN,
140 return zero otherwise. */
143 ftrace_function_switched (const struct btrace_function
*bfun
,
144 const struct minimal_symbol
*mfun
,
145 const struct symbol
*fun
)
147 struct minimal_symbol
*msym
;
153 /* If the minimal symbol changed, we certainly switched functions. */
154 if (mfun
!= NULL
&& msym
!= NULL
155 && strcmp (MSYMBOL_LINKAGE_NAME (mfun
), MSYMBOL_LINKAGE_NAME (msym
)) != 0)
158 /* If the symbol changed, we certainly switched functions. */
159 if (fun
!= NULL
&& sym
!= NULL
)
161 const char *bfname
, *fname
;
163 /* Check the function name. */
164 if (strcmp (SYMBOL_LINKAGE_NAME (fun
), SYMBOL_LINKAGE_NAME (sym
)) != 0)
167 /* Check the location of those functions, as well. */
168 bfname
= symtab_to_fullname (symbol_symtab (sym
));
169 fname
= symtab_to_fullname (symbol_symtab (fun
));
170 if (filename_cmp (fname
, bfname
) != 0)
174 /* If we lost symbol information, we switched functions. */
175 if (!(msym
== NULL
&& sym
== NULL
) && mfun
== NULL
&& fun
== NULL
)
178 /* If we gained symbol information, we switched functions. */
179 if (msym
== NULL
&& sym
== NULL
&& !(mfun
== NULL
&& fun
== NULL
))
185 /* Allocate and initialize a new branch trace function segment.
186 PREV is the chronologically preceding function segment.
187 MFUN and FUN are the symbol information we have for this function. */
189 static struct btrace_function
*
190 ftrace_new_function (struct btrace_function
*prev
,
191 struct minimal_symbol
*mfun
,
194 struct btrace_function
*bfun
;
196 bfun
= xzalloc (sizeof (*bfun
));
200 bfun
->flow
.prev
= prev
;
204 /* Start counting at one. */
206 bfun
->insn_offset
= 1;
210 gdb_assert (prev
->flow
.next
== NULL
);
211 prev
->flow
.next
= bfun
;
213 bfun
->number
= prev
->number
+ 1;
214 bfun
->insn_offset
= (prev
->insn_offset
215 + VEC_length (btrace_insn_s
, prev
->insn
));
216 bfun
->level
= prev
->level
;
222 /* Update the UP field of a function segment. */
225 ftrace_update_caller (struct btrace_function
*bfun
,
226 struct btrace_function
*caller
,
227 enum btrace_function_flag flags
)
229 if (bfun
->up
!= NULL
)
230 ftrace_debug (bfun
, "updating caller");
235 ftrace_debug (bfun
, "set caller");
238 /* Fix up the caller for all segments of a function. */
241 ftrace_fixup_caller (struct btrace_function
*bfun
,
242 struct btrace_function
*caller
,
243 enum btrace_function_flag flags
)
245 struct btrace_function
*prev
, *next
;
247 ftrace_update_caller (bfun
, caller
, flags
);
249 /* Update all function segments belonging to the same function. */
250 for (prev
= bfun
->segment
.prev
; prev
!= NULL
; prev
= prev
->segment
.prev
)
251 ftrace_update_caller (prev
, caller
, flags
);
253 for (next
= bfun
->segment
.next
; next
!= NULL
; next
= next
->segment
.next
)
254 ftrace_update_caller (next
, caller
, flags
);
257 /* Add a new function segment for a call.
258 CALLER is the chronologically preceding function segment.
259 MFUN and FUN are the symbol information we have for this function. */
261 static struct btrace_function
*
262 ftrace_new_call (struct btrace_function
*caller
,
263 struct minimal_symbol
*mfun
,
266 struct btrace_function
*bfun
;
268 bfun
= ftrace_new_function (caller
, mfun
, fun
);
272 ftrace_debug (bfun
, "new call");
277 /* Add a new function segment for a tail call.
278 CALLER is the chronologically preceding function segment.
279 MFUN and FUN are the symbol information we have for this function. */
281 static struct btrace_function
*
282 ftrace_new_tailcall (struct btrace_function
*caller
,
283 struct minimal_symbol
*mfun
,
286 struct btrace_function
*bfun
;
288 bfun
= ftrace_new_function (caller
, mfun
, fun
);
291 bfun
->flags
|= BFUN_UP_LINKS_TO_TAILCALL
;
293 ftrace_debug (bfun
, "new tail call");
298 /* Find the innermost caller in the back trace of BFUN with MFUN/FUN
299 symbol information. */
301 static struct btrace_function
*
302 ftrace_find_caller (struct btrace_function
*bfun
,
303 struct minimal_symbol
*mfun
,
306 for (; bfun
!= NULL
; bfun
= bfun
->up
)
308 /* Skip functions with incompatible symbol information. */
309 if (ftrace_function_switched (bfun
, mfun
, fun
))
312 /* This is the function segment we're looking for. */
319 /* Find the innermost caller in the back trace of BFUN, skipping all
320 function segments that do not end with a call instruction (e.g.
321 tail calls ending with a jump). */
323 static struct btrace_function
*
324 ftrace_find_call (struct btrace_function
*bfun
)
326 for (; bfun
!= NULL
; bfun
= bfun
->up
)
328 struct btrace_insn
*last
;
331 if (bfun
->errcode
!= 0)
334 last
= VEC_last (btrace_insn_s
, bfun
->insn
);
336 if (last
->iclass
== BTRACE_INSN_CALL
)
343 /* Add a continuation segment for a function into which we return.
344 PREV is the chronologically preceding function segment.
345 MFUN and FUN are the symbol information we have for this function. */
347 static struct btrace_function
*
348 ftrace_new_return (struct btrace_function
*prev
,
349 struct minimal_symbol
*mfun
,
352 struct btrace_function
*bfun
, *caller
;
354 bfun
= ftrace_new_function (prev
, mfun
, fun
);
356 /* It is important to start at PREV's caller. Otherwise, we might find
357 PREV itself, if PREV is a recursive function. */
358 caller
= ftrace_find_caller (prev
->up
, mfun
, fun
);
361 /* The caller of PREV is the preceding btrace function segment in this
362 function instance. */
363 gdb_assert (caller
->segment
.next
== NULL
);
365 caller
->segment
.next
= bfun
;
366 bfun
->segment
.prev
= caller
;
368 /* Maintain the function level. */
369 bfun
->level
= caller
->level
;
371 /* Maintain the call stack. */
372 bfun
->up
= caller
->up
;
373 bfun
->flags
= caller
->flags
;
375 ftrace_debug (bfun
, "new return");
379 /* We did not find a caller. This could mean that something went
380 wrong or that the call is simply not included in the trace. */
382 /* Let's search for some actual call. */
383 caller
= ftrace_find_call (prev
->up
);
386 /* There is no call in PREV's back trace. We assume that the
387 branch trace did not include it. */
389 /* Let's find the topmost call function - this skips tail calls. */
390 while (prev
->up
!= NULL
)
393 /* We maintain levels for a series of returns for which we have
395 We start at the preceding function's level in case this has
396 already been a return for which we have not seen the call.
397 We start at level 0 otherwise, to handle tail calls correctly. */
398 bfun
->level
= min (0, prev
->level
) - 1;
400 /* Fix up the call stack for PREV. */
401 ftrace_fixup_caller (prev
, bfun
, BFUN_UP_LINKS_TO_RET
);
403 ftrace_debug (bfun
, "new return - no caller");
407 /* There is a call in PREV's back trace to which we should have
408 returned. Let's remain at this level. */
409 bfun
->level
= prev
->level
;
411 ftrace_debug (bfun
, "new return - unknown caller");
418 /* Add a new function segment for a function switch.
419 PREV is the chronologically preceding function segment.
420 MFUN and FUN are the symbol information we have for this function. */
422 static struct btrace_function
*
423 ftrace_new_switch (struct btrace_function
*prev
,
424 struct minimal_symbol
*mfun
,
427 struct btrace_function
*bfun
;
429 /* This is an unexplained function switch. The call stack will likely
430 be wrong at this point. */
431 bfun
= ftrace_new_function (prev
, mfun
, fun
);
433 ftrace_debug (bfun
, "new switch");
438 /* Add a new function segment for a gap in the trace due to a decode error.
439 PREV is the chronologically preceding function segment.
440 ERRCODE is the format-specific error code. */
442 static struct btrace_function
*
443 ftrace_new_gap (struct btrace_function
*prev
, int errcode
)
445 struct btrace_function
*bfun
;
447 /* We hijack prev if it was empty. */
448 if (prev
!= NULL
&& prev
->errcode
== 0
449 && VEC_empty (btrace_insn_s
, prev
->insn
))
452 bfun
= ftrace_new_function (prev
, NULL
, NULL
);
454 bfun
->errcode
= errcode
;
456 ftrace_debug (bfun
, "new gap");
461 /* Update BFUN with respect to the instruction at PC. This may create new
463 Return the chronologically latest function segment, never NULL. */
465 static struct btrace_function
*
466 ftrace_update_function (struct btrace_function
*bfun
, CORE_ADDR pc
)
468 struct bound_minimal_symbol bmfun
;
469 struct minimal_symbol
*mfun
;
471 struct btrace_insn
*last
;
473 /* Try to determine the function we're in. We use both types of symbols
474 to avoid surprises when we sometimes get a full symbol and sometimes
475 only a minimal symbol. */
476 fun
= find_pc_function (pc
);
477 bmfun
= lookup_minimal_symbol_by_pc (pc
);
480 if (fun
== NULL
&& mfun
== NULL
)
481 DEBUG_FTRACE ("no symbol at %s", core_addr_to_string_nz (pc
));
483 /* If we didn't have a function or if we had a gap before, we create one. */
484 if (bfun
== NULL
|| bfun
->errcode
!= 0)
485 return ftrace_new_function (bfun
, mfun
, fun
);
487 /* Check the last instruction, if we have one.
488 We do this check first, since it allows us to fill in the call stack
489 links in addition to the normal flow links. */
491 if (!VEC_empty (btrace_insn_s
, bfun
->insn
))
492 last
= VEC_last (btrace_insn_s
, bfun
->insn
);
496 switch (last
->iclass
)
498 case BTRACE_INSN_RETURN
:
502 /* On some systems, _dl_runtime_resolve returns to the resolved
503 function instead of jumping to it. From our perspective,
504 however, this is a tailcall.
505 If we treated it as return, we wouldn't be able to find the
506 resolved function in our stack back trace. Hence, we would
507 lose the current stack back trace and start anew with an empty
508 back trace. When the resolved function returns, we would then
509 create a stack back trace with the same function names but
510 different frame id's. This will confuse stepping. */
511 fname
= ftrace_print_function_name (bfun
);
512 if (strcmp (fname
, "_dl_runtime_resolve") == 0)
513 return ftrace_new_tailcall (bfun
, mfun
, fun
);
515 return ftrace_new_return (bfun
, mfun
, fun
);
518 case BTRACE_INSN_CALL
:
519 /* Ignore calls to the next instruction. They are used for PIC. */
520 if (last
->pc
+ last
->size
== pc
)
523 return ftrace_new_call (bfun
, mfun
, fun
);
525 case BTRACE_INSN_JUMP
:
529 start
= get_pc_function_start (pc
);
531 /* If we can't determine the function for PC, we treat a jump at
532 the end of the block as tail call. */
533 if (start
== 0 || start
== pc
)
534 return ftrace_new_tailcall (bfun
, mfun
, fun
);
539 /* Check if we're switching functions for some other reason. */
540 if (ftrace_function_switched (bfun
, mfun
, fun
))
542 DEBUG_FTRACE ("switching from %s in %s at %s",
543 ftrace_print_insn_addr (last
),
544 ftrace_print_function_name (bfun
),
545 ftrace_print_filename (bfun
));
547 return ftrace_new_switch (bfun
, mfun
, fun
);
553 /* Add the instruction at PC to BFUN's instructions. */
556 ftrace_update_insns (struct btrace_function
*bfun
,
557 const struct btrace_insn
*insn
)
559 VEC_safe_push (btrace_insn_s
, bfun
->insn
, insn
);
561 if (record_debug
> 1)
562 ftrace_debug (bfun
, "update insn");
565 /* Classify the instruction at PC. */
567 static enum btrace_insn_class
568 ftrace_classify_insn (struct gdbarch
*gdbarch
, CORE_ADDR pc
)
570 enum btrace_insn_class iclass
;
572 iclass
= BTRACE_INSN_OTHER
;
575 if (gdbarch_insn_is_call (gdbarch
, pc
))
576 iclass
= BTRACE_INSN_CALL
;
577 else if (gdbarch_insn_is_ret (gdbarch
, pc
))
578 iclass
= BTRACE_INSN_RETURN
;
579 else if (gdbarch_insn_is_jump (gdbarch
, pc
))
580 iclass
= BTRACE_INSN_JUMP
;
582 CATCH (error
, RETURN_MASK_ERROR
)
590 /* Compute the function branch trace from BTS trace. */
593 btrace_compute_ftrace_bts (struct thread_info
*tp
,
594 const struct btrace_data_bts
*btrace
)
596 struct btrace_thread_info
*btinfo
;
597 struct btrace_function
*begin
, *end
;
598 struct gdbarch
*gdbarch
;
599 unsigned int blk
, ngaps
;
602 gdbarch
= target_gdbarch ();
603 btinfo
= &tp
->btrace
;
604 begin
= btinfo
->begin
;
606 ngaps
= btinfo
->ngaps
;
607 level
= begin
!= NULL
? -btinfo
->level
: INT_MAX
;
608 blk
= VEC_length (btrace_block_s
, btrace
->blocks
);
612 btrace_block_s
*block
;
617 block
= VEC_index (btrace_block_s
, btrace
->blocks
, blk
);
622 struct btrace_insn insn
;
625 /* We should hit the end of the block. Warn if we went too far. */
628 /* Indicate the gap in the trace - unless we're at the
632 warning (_("Recorded trace may be corrupted around %s."),
633 core_addr_to_string_nz (pc
));
635 end
= ftrace_new_gap (end
, BDE_BTS_OVERFLOW
);
641 end
= ftrace_update_function (end
, pc
);
645 /* Maintain the function level offset.
646 For all but the last block, we do it here. */
648 level
= min (level
, end
->level
);
653 size
= gdb_insn_length (gdbarch
, pc
);
655 CATCH (error
, RETURN_MASK_ERROR
)
662 insn
.iclass
= ftrace_classify_insn (gdbarch
, pc
);
664 ftrace_update_insns (end
, &insn
);
666 /* We're done once we pushed the instruction at the end. */
667 if (block
->end
== pc
)
670 /* We can't continue if we fail to compute the size. */
673 warning (_("Recorded trace may be incomplete around %s."),
674 core_addr_to_string_nz (pc
));
676 /* Indicate the gap in the trace. We just added INSN so we're
677 not at the beginning. */
678 end
= ftrace_new_gap (end
, BDE_BTS_INSN_SIZE
);
686 /* Maintain the function level offset.
687 For the last block, we do it here to not consider the last
689 Since the last instruction corresponds to the current instruction
690 and is not really part of the execution history, it shouldn't
693 level
= min (level
, end
->level
);
697 btinfo
->begin
= begin
;
699 btinfo
->ngaps
= ngaps
;
701 /* LEVEL is the minimal function level of all btrace function segments.
702 Define the global level offset to -LEVEL so all function levels are
703 normalized to start at zero. */
704 btinfo
->level
= -level
;
707 #if defined (HAVE_LIBIPT)
709 static enum btrace_insn_class
710 pt_reclassify_insn (enum pt_insn_class iclass
)
715 return BTRACE_INSN_CALL
;
718 return BTRACE_INSN_RETURN
;
721 return BTRACE_INSN_JUMP
;
724 return BTRACE_INSN_OTHER
;
728 /* Add function branch trace using DECODER. */
731 ftrace_add_pt (struct pt_insn_decoder
*decoder
,
732 struct btrace_function
**pbegin
,
733 struct btrace_function
**pend
, int *plevel
,
736 struct btrace_function
*begin
, *end
, *upd
;
738 int errcode
, nerrors
;
745 struct btrace_insn btinsn
;
748 errcode
= pt_insn_sync_forward (decoder
);
751 if (errcode
!= -pte_eos
)
752 warning (_("Failed to synchronize onto the Intel(R) Processor "
753 "Trace stream: %s."), pt_errstr (pt_errcode (errcode
)));
757 memset (&btinsn
, 0, sizeof (btinsn
));
760 errcode
= pt_insn_next (decoder
, &insn
, sizeof(insn
));
764 /* Look for gaps in the trace - unless we're at the beginning. */
767 /* Tracing is disabled and re-enabled each time we enter the
768 kernel. Most times, we continue from the same instruction we
769 stopped before. This is indicated via the RESUMED instruction
770 flag. The ENABLED instruction flag means that we continued
771 from some other instruction. Indicate this as a trace gap. */
773 *pend
= end
= ftrace_new_gap (end
, BDE_PT_DISABLED
);
775 /* Indicate trace overflows. */
777 *pend
= end
= ftrace_new_gap (end
, BDE_PT_OVERFLOW
);
780 upd
= ftrace_update_function (end
, insn
.ip
);
786 *pbegin
= begin
= upd
;
789 /* Maintain the function level offset. */
790 *plevel
= min (*plevel
, end
->level
);
792 btinsn
.pc
= (CORE_ADDR
) insn
.ip
;
793 btinsn
.size
= (gdb_byte
) insn
.size
;
794 btinsn
.iclass
= pt_reclassify_insn (insn
.iclass
);
796 ftrace_update_insns (end
, &btinsn
);
799 if (errcode
== -pte_eos
)
802 /* If the gap is at the very beginning, we ignore it - we will have
803 less trace, but we won't have any holes in the trace. */
807 pt_insn_get_offset (decoder
, &offset
);
809 warning (_("Failed to decode Intel(R) Processor Trace near trace "
810 "offset 0x%" PRIx64
" near recorded PC 0x%" PRIx64
": %s."),
811 offset
, insn
.ip
, pt_errstr (pt_errcode (errcode
)));
813 /* Indicate the gap in the trace. */
814 *pend
= end
= ftrace_new_gap (end
, errcode
);
819 warning (_("The recorded execution trace may have gaps."));
822 /* A callback function to allow the trace decoder to read the inferior's
826 btrace_pt_readmem_callback (gdb_byte
*buffer
, size_t size
,
827 const struct pt_asid
*asid
, CORE_ADDR pc
,
834 errcode
= target_read_code (pc
, buffer
, size
);
838 CATCH (error
, RETURN_MASK_ERROR
)
847 /* Translate the vendor from one enum to another. */
849 static enum pt_cpu_vendor
850 pt_translate_cpu_vendor (enum btrace_cpu_vendor vendor
)
862 /* Finalize the function branch trace after decode. */
864 static void btrace_finalize_ftrace_pt (struct pt_insn_decoder
*decoder
,
865 struct thread_info
*tp
, int level
)
867 pt_insn_free_decoder (decoder
);
869 /* LEVEL is the minimal function level of all btrace function segments.
870 Define the global level offset to -LEVEL so all function levels are
871 normalized to start at zero. */
872 tp
->btrace
.level
= -level
;
874 /* Add a single last instruction entry for the current PC.
875 This allows us to compute the backtrace at the current PC using both
876 standard unwind and btrace unwind.
877 This extra entry is ignored by all record commands. */
881 /* Compute the function branch trace from Intel(R) Processor Trace. */
884 btrace_compute_ftrace_pt (struct thread_info
*tp
,
885 const struct btrace_data_pt
*btrace
)
887 struct btrace_thread_info
*btinfo
;
888 struct pt_insn_decoder
*decoder
;
889 struct pt_config config
;
892 if (btrace
->size
== 0)
895 btinfo
= &tp
->btrace
;
896 level
= btinfo
->begin
!= NULL
? -btinfo
->level
: INT_MAX
;
898 pt_config_init(&config
);
899 config
.begin
= btrace
->data
;
900 config
.end
= btrace
->data
+ btrace
->size
;
902 config
.cpu
.vendor
= pt_translate_cpu_vendor (btrace
->config
.cpu
.vendor
);
903 config
.cpu
.family
= btrace
->config
.cpu
.family
;
904 config
.cpu
.model
= btrace
->config
.cpu
.model
;
905 config
.cpu
.stepping
= btrace
->config
.cpu
.stepping
;
907 errcode
= pt_cpu_errata (&config
.errata
, &config
.cpu
);
909 error (_("Failed to configure the Intel(R) Processor Trace decoder: %s."),
910 pt_errstr (pt_errcode (errcode
)));
912 decoder
= pt_insn_alloc_decoder (&config
);
914 error (_("Failed to allocate the Intel(R) Processor Trace decoder."));
918 struct pt_image
*image
;
920 image
= pt_insn_get_image(decoder
);
922 error (_("Failed to configure the Intel(R) Processor Trace decoder."));
924 errcode
= pt_image_set_callback(image
, btrace_pt_readmem_callback
, NULL
);
926 error (_("Failed to configure the Intel(R) Processor Trace decoder: "
927 "%s."), pt_errstr (pt_errcode (errcode
)));
929 ftrace_add_pt (decoder
, &btinfo
->begin
, &btinfo
->end
, &level
,
932 CATCH (error
, RETURN_MASK_ALL
)
934 /* Indicate a gap in the trace if we quit trace processing. */
935 if (error
.reason
== RETURN_QUIT
&& btinfo
->end
!= NULL
)
937 btinfo
->end
= ftrace_new_gap (btinfo
->end
, BDE_PT_USER_QUIT
);
941 btrace_finalize_ftrace_pt (decoder
, tp
, level
);
943 throw_exception (error
);
947 btrace_finalize_ftrace_pt (decoder
, tp
, level
);
950 #else /* defined (HAVE_LIBIPT) */
953 btrace_compute_ftrace_pt (struct thread_info
*tp
,
954 const struct btrace_data_pt
*btrace
)
956 internal_error (__FILE__
, __LINE__
, _("Unexpected branch trace format."));
959 #endif /* defined (HAVE_LIBIPT) */
961 /* Compute the function branch trace from a block branch trace BTRACE for
962 a thread given by BTINFO. */
965 btrace_compute_ftrace (struct thread_info
*tp
, struct btrace_data
*btrace
)
967 DEBUG ("compute ftrace");
969 switch (btrace
->format
)
971 case BTRACE_FORMAT_NONE
:
974 case BTRACE_FORMAT_BTS
:
975 btrace_compute_ftrace_bts (tp
, &btrace
->variant
.bts
);
978 case BTRACE_FORMAT_PT
:
979 btrace_compute_ftrace_pt (tp
, &btrace
->variant
.pt
);
983 internal_error (__FILE__
, __LINE__
, _("Unkown branch trace format."));
986 /* Add an entry for the current PC. */
989 btrace_add_pc (struct thread_info
*tp
)
991 struct btrace_data btrace
;
992 struct btrace_block
*block
;
993 struct regcache
*regcache
;
994 struct cleanup
*cleanup
;
997 regcache
= get_thread_regcache (tp
->ptid
);
998 pc
= regcache_read_pc (regcache
);
1000 btrace_data_init (&btrace
);
1001 btrace
.format
= BTRACE_FORMAT_BTS
;
1002 btrace
.variant
.bts
.blocks
= NULL
;
1004 cleanup
= make_cleanup_btrace_data (&btrace
);
1006 block
= VEC_safe_push (btrace_block_s
, btrace
.variant
.bts
.blocks
, NULL
);
1010 btrace_compute_ftrace (tp
, &btrace
);
1012 do_cleanups (cleanup
);
1018 btrace_enable (struct thread_info
*tp
, const struct btrace_config
*conf
)
1020 if (tp
->btrace
.target
!= NULL
)
1023 if (!target_supports_btrace (conf
->format
))
1024 error (_("Target does not support branch tracing."));
1026 DEBUG ("enable thread %d (%s)", tp
->num
, target_pid_to_str (tp
->ptid
));
1028 tp
->btrace
.target
= target_enable_btrace (tp
->ptid
, conf
);
1030 /* Add an entry for the current PC so we start tracing from where we
1032 if (tp
->btrace
.target
!= NULL
)
1038 const struct btrace_config
*
1039 btrace_conf (const struct btrace_thread_info
*btinfo
)
1041 if (btinfo
->target
== NULL
)
1044 return target_btrace_conf (btinfo
->target
);
1050 btrace_disable (struct thread_info
*tp
)
1052 struct btrace_thread_info
*btp
= &tp
->btrace
;
1055 if (btp
->target
== NULL
)
1058 DEBUG ("disable thread %d (%s)", tp
->num
, target_pid_to_str (tp
->ptid
));
1060 target_disable_btrace (btp
->target
);
1069 btrace_teardown (struct thread_info
*tp
)
1071 struct btrace_thread_info
*btp
= &tp
->btrace
;
1074 if (btp
->target
== NULL
)
1077 DEBUG ("teardown thread %d (%s)", tp
->num
, target_pid_to_str (tp
->ptid
));
1079 target_teardown_btrace (btp
->target
);
1085 /* Stitch branch trace in BTS format. */
1088 btrace_stitch_bts (struct btrace_data_bts
*btrace
, struct thread_info
*tp
)
1090 struct btrace_thread_info
*btinfo
;
1091 struct btrace_function
*last_bfun
;
1092 struct btrace_insn
*last_insn
;
1093 btrace_block_s
*first_new_block
;
1095 btinfo
= &tp
->btrace
;
1096 last_bfun
= btinfo
->end
;
1097 gdb_assert (last_bfun
!= NULL
);
1098 gdb_assert (!VEC_empty (btrace_block_s
, btrace
->blocks
));
1100 /* If the existing trace ends with a gap, we just glue the traces
1101 together. We need to drop the last (i.e. chronologically first) block
1102 of the new trace, though, since we can't fill in the start address.*/
1103 if (VEC_empty (btrace_insn_s
, last_bfun
->insn
))
1105 VEC_pop (btrace_block_s
, btrace
->blocks
);
1109 /* Beware that block trace starts with the most recent block, so the
1110 chronologically first block in the new trace is the last block in
1111 the new trace's block vector. */
1112 first_new_block
= VEC_last (btrace_block_s
, btrace
->blocks
);
1113 last_insn
= VEC_last (btrace_insn_s
, last_bfun
->insn
);
1115 /* If the current PC at the end of the block is the same as in our current
1116 trace, there are two explanations:
1117 1. we executed the instruction and some branch brought us back.
1118 2. we have not made any progress.
1119 In the first case, the delta trace vector should contain at least two
1121 In the second case, the delta trace vector should contain exactly one
1122 entry for the partial block containing the current PC. Remove it. */
1123 if (first_new_block
->end
== last_insn
->pc
1124 && VEC_length (btrace_block_s
, btrace
->blocks
) == 1)
1126 VEC_pop (btrace_block_s
, btrace
->blocks
);
1130 DEBUG ("stitching %s to %s", ftrace_print_insn_addr (last_insn
),
1131 core_addr_to_string_nz (first_new_block
->end
));
1133 /* Do a simple sanity check to make sure we don't accidentally end up
1134 with a bad block. This should not occur in practice. */
1135 if (first_new_block
->end
< last_insn
->pc
)
1137 warning (_("Error while trying to read delta trace. Falling back to "
1142 /* We adjust the last block to start at the end of our current trace. */
1143 gdb_assert (first_new_block
->begin
== 0);
1144 first_new_block
->begin
= last_insn
->pc
;
1146 /* We simply pop the last insn so we can insert it again as part of
1147 the normal branch trace computation.
1148 Since instruction iterators are based on indices in the instructions
1149 vector, we don't leave any pointers dangling. */
1150 DEBUG ("pruning insn at %s for stitching",
1151 ftrace_print_insn_addr (last_insn
));
1153 VEC_pop (btrace_insn_s
, last_bfun
->insn
);
1155 /* The instructions vector may become empty temporarily if this has
1156 been the only instruction in this function segment.
1157 This violates the invariant but will be remedied shortly by
1158 btrace_compute_ftrace when we add the new trace. */
1160 /* The only case where this would hurt is if the entire trace consisted
1161 of just that one instruction. If we remove it, we might turn the now
1162 empty btrace function segment into a gap. But we don't want gaps at
1163 the beginning. To avoid this, we remove the entire old trace. */
1164 if (last_bfun
== btinfo
->begin
&& VEC_empty (btrace_insn_s
, last_bfun
->insn
))
1170 /* Adjust the block trace in order to stitch old and new trace together.
1171 BTRACE is the new delta trace between the last and the current stop.
1172 TP is the traced thread.
1173 May modifx BTRACE as well as the existing trace in TP.
1174 Return 0 on success, -1 otherwise. */
1177 btrace_stitch_trace (struct btrace_data
*btrace
, struct thread_info
*tp
)
1179 /* If we don't have trace, there's nothing to do. */
1180 if (btrace_data_empty (btrace
))
1183 switch (btrace
->format
)
1185 case BTRACE_FORMAT_NONE
:
1188 case BTRACE_FORMAT_BTS
:
1189 return btrace_stitch_bts (&btrace
->variant
.bts
, tp
);
1191 case BTRACE_FORMAT_PT
:
1192 /* Delta reads are not supported. */
1196 internal_error (__FILE__
, __LINE__
, _("Unkown branch trace format."));
1199 /* Clear the branch trace histories in BTINFO. */
1202 btrace_clear_history (struct btrace_thread_info
*btinfo
)
1204 xfree (btinfo
->insn_history
);
1205 xfree (btinfo
->call_history
);
1206 xfree (btinfo
->replay
);
1208 btinfo
->insn_history
= NULL
;
1209 btinfo
->call_history
= NULL
;
1210 btinfo
->replay
= NULL
;
1213 /* Clear the branch trace maintenance histories in BTINFO. */
1216 btrace_maint_clear (struct btrace_thread_info
*btinfo
)
1218 switch (btinfo
->data
.format
)
1223 case BTRACE_FORMAT_BTS
:
1224 btinfo
->maint
.variant
.bts
.packet_history
.begin
= 0;
1225 btinfo
->maint
.variant
.bts
.packet_history
.end
= 0;
1228 #if defined (HAVE_LIBIPT)
1229 case BTRACE_FORMAT_PT
:
1230 xfree (btinfo
->maint
.variant
.pt
.packets
);
1232 btinfo
->maint
.variant
.pt
.packets
= NULL
;
1233 btinfo
->maint
.variant
.pt
.packet_history
.begin
= 0;
1234 btinfo
->maint
.variant
.pt
.packet_history
.end
= 0;
1236 #endif /* defined (HAVE_LIBIPT) */
1243 btrace_fetch (struct thread_info
*tp
)
1245 struct btrace_thread_info
*btinfo
;
1246 struct btrace_target_info
*tinfo
;
1247 struct btrace_data btrace
;
1248 struct cleanup
*cleanup
;
1251 DEBUG ("fetch thread %d (%s)", tp
->num
, target_pid_to_str (tp
->ptid
));
1253 btinfo
= &tp
->btrace
;
1254 tinfo
= btinfo
->target
;
1258 /* There's no way we could get new trace while replaying.
1259 On the other hand, delta trace would return a partial record with the
1260 current PC, which is the replay PC, not the last PC, as expected. */
1261 if (btinfo
->replay
!= NULL
)
1264 btrace_data_init (&btrace
);
1265 cleanup
= make_cleanup_btrace_data (&btrace
);
1267 /* Let's first try to extend the trace we already have. */
1268 if (btinfo
->end
!= NULL
)
1270 errcode
= target_read_btrace (&btrace
, tinfo
, BTRACE_READ_DELTA
);
1273 /* Success. Let's try to stitch the traces together. */
1274 errcode
= btrace_stitch_trace (&btrace
, tp
);
1278 /* We failed to read delta trace. Let's try to read new trace. */
1279 errcode
= target_read_btrace (&btrace
, tinfo
, BTRACE_READ_NEW
);
1281 /* If we got any new trace, discard what we have. */
1282 if (errcode
== 0 && !btrace_data_empty (&btrace
))
1286 /* If we were not able to read the trace, we start over. */
1290 errcode
= target_read_btrace (&btrace
, tinfo
, BTRACE_READ_ALL
);
1294 errcode
= target_read_btrace (&btrace
, tinfo
, BTRACE_READ_ALL
);
1296 /* If we were not able to read the branch trace, signal an error. */
1298 error (_("Failed to read branch trace."));
1300 /* Compute the trace, provided we have any. */
1301 if (!btrace_data_empty (&btrace
))
1303 /* Store the raw trace data. The stored data will be cleared in
1304 btrace_clear, so we always append the new trace. */
1305 btrace_data_append (&btinfo
->data
, &btrace
);
1306 btrace_maint_clear (btinfo
);
1308 btrace_clear_history (btinfo
);
1309 btrace_compute_ftrace (tp
, &btrace
);
1312 do_cleanups (cleanup
);
1318 btrace_clear (struct thread_info
*tp
)
1320 struct btrace_thread_info
*btinfo
;
1321 struct btrace_function
*it
, *trash
;
1323 DEBUG ("clear thread %d (%s)", tp
->num
, target_pid_to_str (tp
->ptid
));
1325 /* Make sure btrace frames that may hold a pointer into the branch
1326 trace data are destroyed. */
1327 reinit_frame_cache ();
1329 btinfo
= &tp
->btrace
;
1340 btinfo
->begin
= NULL
;
1344 /* Must clear the maint data before - it depends on BTINFO->DATA. */
1345 btrace_maint_clear (btinfo
);
1346 btrace_data_clear (&btinfo
->data
);
1347 btrace_clear_history (btinfo
);
1353 btrace_free_objfile (struct objfile
*objfile
)
1355 struct thread_info
*tp
;
1357 DEBUG ("free objfile");
1359 ALL_NON_EXITED_THREADS (tp
)
1363 #if defined (HAVE_LIBEXPAT)
1365 /* Check the btrace document version. */
1368 check_xml_btrace_version (struct gdb_xml_parser
*parser
,
1369 const struct gdb_xml_element
*element
,
1370 void *user_data
, VEC (gdb_xml_value_s
) *attributes
)
1372 const char *version
= xml_find_attribute (attributes
, "version")->value
;
1374 if (strcmp (version
, "1.0") != 0)
1375 gdb_xml_error (parser
, _("Unsupported btrace version: \"%s\""), version
);
1378 /* Parse a btrace "block" xml record. */
1381 parse_xml_btrace_block (struct gdb_xml_parser
*parser
,
1382 const struct gdb_xml_element
*element
,
1383 void *user_data
, VEC (gdb_xml_value_s
) *attributes
)
1385 struct btrace_data
*btrace
;
1386 struct btrace_block
*block
;
1387 ULONGEST
*begin
, *end
;
1391 switch (btrace
->format
)
1393 case BTRACE_FORMAT_BTS
:
1396 case BTRACE_FORMAT_NONE
:
1397 btrace
->format
= BTRACE_FORMAT_BTS
;
1398 btrace
->variant
.bts
.blocks
= NULL
;
1402 gdb_xml_error (parser
, _("Btrace format error."));
1405 begin
= xml_find_attribute (attributes
, "begin")->value
;
1406 end
= xml_find_attribute (attributes
, "end")->value
;
1408 block
= VEC_safe_push (btrace_block_s
, btrace
->variant
.bts
.blocks
, NULL
);
1409 block
->begin
= *begin
;
1413 /* Parse a "raw" xml record. */
1416 parse_xml_raw (struct gdb_xml_parser
*parser
, const char *body_text
,
1417 gdb_byte
**pdata
, unsigned long *psize
)
1419 struct cleanup
*cleanup
;
1420 gdb_byte
*data
, *bin
;
1424 len
= strlen (body_text
);
1427 if ((size_t) size
* 2 != len
)
1428 gdb_xml_error (parser
, _("Bad raw data size."));
1430 bin
= data
= xmalloc (size
);
1431 cleanup
= make_cleanup (xfree
, data
);
1433 /* We use hex encoding - see common/rsp-low.h. */
1441 if (hi
== 0 || lo
== 0)
1442 gdb_xml_error (parser
, _("Bad hex encoding."));
1444 *bin
++ = fromhex (hi
) * 16 + fromhex (lo
);
1448 discard_cleanups (cleanup
);
1454 /* Parse a btrace pt-config "cpu" xml record. */
1457 parse_xml_btrace_pt_config_cpu (struct gdb_xml_parser
*parser
,
1458 const struct gdb_xml_element
*element
,
1460 VEC (gdb_xml_value_s
) *attributes
)
1462 struct btrace_data
*btrace
;
1464 ULONGEST
*family
, *model
, *stepping
;
1466 vendor
= xml_find_attribute (attributes
, "vendor")->value
;
1467 family
= xml_find_attribute (attributes
, "family")->value
;
1468 model
= xml_find_attribute (attributes
, "model")->value
;
1469 stepping
= xml_find_attribute (attributes
, "stepping")->value
;
1473 if (strcmp (vendor
, "GenuineIntel") == 0)
1474 btrace
->variant
.pt
.config
.cpu
.vendor
= CV_INTEL
;
1476 btrace
->variant
.pt
.config
.cpu
.family
= *family
;
1477 btrace
->variant
.pt
.config
.cpu
.model
= *model
;
1478 btrace
->variant
.pt
.config
.cpu
.stepping
= *stepping
;
1481 /* Parse a btrace pt "raw" xml record. */
1484 parse_xml_btrace_pt_raw (struct gdb_xml_parser
*parser
,
1485 const struct gdb_xml_element
*element
,
1486 void *user_data
, const char *body_text
)
1488 struct btrace_data
*btrace
;
1491 parse_xml_raw (parser
, body_text
, &btrace
->variant
.pt
.data
,
1492 &btrace
->variant
.pt
.size
);
1495 /* Parse a btrace "pt" xml record. */
1498 parse_xml_btrace_pt (struct gdb_xml_parser
*parser
,
1499 const struct gdb_xml_element
*element
,
1500 void *user_data
, VEC (gdb_xml_value_s
) *attributes
)
1502 struct btrace_data
*btrace
;
1505 btrace
->format
= BTRACE_FORMAT_PT
;
1506 btrace
->variant
.pt
.config
.cpu
.vendor
= CV_UNKNOWN
;
1507 btrace
->variant
.pt
.data
= NULL
;
1508 btrace
->variant
.pt
.size
= 0;
1511 static const struct gdb_xml_attribute block_attributes
[] = {
1512 { "begin", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
1513 { "end", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
1514 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
1517 static const struct gdb_xml_attribute btrace_pt_config_cpu_attributes
[] = {
1518 { "vendor", GDB_XML_AF_NONE
, NULL
, NULL
},
1519 { "family", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
1520 { "model", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
1521 { "stepping", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
1522 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
1525 static const struct gdb_xml_element btrace_pt_config_children
[] = {
1526 { "cpu", btrace_pt_config_cpu_attributes
, NULL
, GDB_XML_EF_OPTIONAL
,
1527 parse_xml_btrace_pt_config_cpu
, NULL
},
1528 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
1531 static const struct gdb_xml_element btrace_pt_children
[] = {
1532 { "pt-config", NULL
, btrace_pt_config_children
, GDB_XML_EF_OPTIONAL
, NULL
,
1534 { "raw", NULL
, NULL
, GDB_XML_EF_OPTIONAL
, NULL
, parse_xml_btrace_pt_raw
},
1535 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
1538 static const struct gdb_xml_attribute btrace_attributes
[] = {
1539 { "version", GDB_XML_AF_NONE
, NULL
, NULL
},
1540 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
1543 static const struct gdb_xml_element btrace_children
[] = {
1544 { "block", block_attributes
, NULL
,
1545 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
, parse_xml_btrace_block
, NULL
},
1546 { "pt", NULL
, btrace_pt_children
, GDB_XML_EF_OPTIONAL
, parse_xml_btrace_pt
,
1548 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
1551 static const struct gdb_xml_element btrace_elements
[] = {
1552 { "btrace", btrace_attributes
, btrace_children
, GDB_XML_EF_NONE
,
1553 check_xml_btrace_version
, NULL
},
1554 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
1557 #endif /* defined (HAVE_LIBEXPAT) */
1562 parse_xml_btrace (struct btrace_data
*btrace
, const char *buffer
)
1564 struct cleanup
*cleanup
;
1567 #if defined (HAVE_LIBEXPAT)
1569 btrace
->format
= BTRACE_FORMAT_NONE
;
1571 cleanup
= make_cleanup_btrace_data (btrace
);
1572 errcode
= gdb_xml_parse_quick (_("btrace"), "btrace.dtd", btrace_elements
,
1575 error (_("Error parsing branch trace."));
1577 /* Keep parse results. */
1578 discard_cleanups (cleanup
);
1580 #else /* !defined (HAVE_LIBEXPAT) */
1582 error (_("Cannot process branch trace. XML parsing is not supported."));
1584 #endif /* !defined (HAVE_LIBEXPAT) */
1587 #if defined (HAVE_LIBEXPAT)
1589 /* Parse a btrace-conf "bts" xml record. */
1592 parse_xml_btrace_conf_bts (struct gdb_xml_parser
*parser
,
1593 const struct gdb_xml_element
*element
,
1594 void *user_data
, VEC (gdb_xml_value_s
) *attributes
)
1596 struct btrace_config
*conf
;
1597 struct gdb_xml_value
*size
;
1600 conf
->format
= BTRACE_FORMAT_BTS
;
1603 size
= xml_find_attribute (attributes
, "size");
1605 conf
->bts
.size
= (unsigned int) *(ULONGEST
*) size
->value
;
1608 /* Parse a btrace-conf "pt" xml record. */
1611 parse_xml_btrace_conf_pt (struct gdb_xml_parser
*parser
,
1612 const struct gdb_xml_element
*element
,
1613 void *user_data
, VEC (gdb_xml_value_s
) *attributes
)
1615 struct btrace_config
*conf
;
1616 struct gdb_xml_value
*size
;
1619 conf
->format
= BTRACE_FORMAT_PT
;
1622 size
= xml_find_attribute (attributes
, "size");
1624 conf
->pt
.size
= (unsigned int) *(ULONGEST
*) size
->value
;
1627 static const struct gdb_xml_attribute btrace_conf_pt_attributes
[] = {
1628 { "size", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
1629 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
1632 static const struct gdb_xml_attribute btrace_conf_bts_attributes
[] = {
1633 { "size", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
1634 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
1637 static const struct gdb_xml_element btrace_conf_children
[] = {
1638 { "bts", btrace_conf_bts_attributes
, NULL
, GDB_XML_EF_OPTIONAL
,
1639 parse_xml_btrace_conf_bts
, NULL
},
1640 { "pt", btrace_conf_pt_attributes
, NULL
, GDB_XML_EF_OPTIONAL
,
1641 parse_xml_btrace_conf_pt
, NULL
},
1642 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
1645 static const struct gdb_xml_attribute btrace_conf_attributes
[] = {
1646 { "version", GDB_XML_AF_NONE
, NULL
, NULL
},
1647 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
1650 static const struct gdb_xml_element btrace_conf_elements
[] = {
1651 { "btrace-conf", btrace_conf_attributes
, btrace_conf_children
,
1652 GDB_XML_EF_NONE
, NULL
, NULL
},
1653 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
1656 #endif /* defined (HAVE_LIBEXPAT) */
1661 parse_xml_btrace_conf (struct btrace_config
*conf
, const char *xml
)
1665 #if defined (HAVE_LIBEXPAT)
1667 errcode
= gdb_xml_parse_quick (_("btrace-conf"), "btrace-conf.dtd",
1668 btrace_conf_elements
, xml
, conf
);
1670 error (_("Error parsing branch trace configuration."));
1672 #else /* !defined (HAVE_LIBEXPAT) */
1674 error (_("XML parsing is not supported."));
1676 #endif /* !defined (HAVE_LIBEXPAT) */
1681 const struct btrace_insn
*
1682 btrace_insn_get (const struct btrace_insn_iterator
*it
)
1684 const struct btrace_function
*bfun
;
1685 unsigned int index
, end
;
1688 bfun
= it
->function
;
1690 /* Check if the iterator points to a gap in the trace. */
1691 if (bfun
->errcode
!= 0)
1694 /* The index is within the bounds of this function's instruction vector. */
1695 end
= VEC_length (btrace_insn_s
, bfun
->insn
);
1696 gdb_assert (0 < end
);
1697 gdb_assert (index
< end
);
1699 return VEC_index (btrace_insn_s
, bfun
->insn
, index
);
1705 btrace_insn_number (const struct btrace_insn_iterator
*it
)
1707 const struct btrace_function
*bfun
;
1709 bfun
= it
->function
;
1711 /* Return zero if the iterator points to a gap in the trace. */
1712 if (bfun
->errcode
!= 0)
1715 return bfun
->insn_offset
+ it
->index
;
1721 btrace_insn_begin (struct btrace_insn_iterator
*it
,
1722 const struct btrace_thread_info
*btinfo
)
1724 const struct btrace_function
*bfun
;
1726 bfun
= btinfo
->begin
;
1728 error (_("No trace."));
1730 it
->function
= bfun
;
1737 btrace_insn_end (struct btrace_insn_iterator
*it
,
1738 const struct btrace_thread_info
*btinfo
)
1740 const struct btrace_function
*bfun
;
1741 unsigned int length
;
1745 error (_("No trace."));
1747 length
= VEC_length (btrace_insn_s
, bfun
->insn
);
1749 /* The last function may either be a gap or it contains the current
1750 instruction, which is one past the end of the execution trace; ignore
1755 it
->function
= bfun
;
1762 btrace_insn_next (struct btrace_insn_iterator
*it
, unsigned int stride
)
1764 const struct btrace_function
*bfun
;
1765 unsigned int index
, steps
;
1767 bfun
= it
->function
;
1773 unsigned int end
, space
, adv
;
1775 end
= VEC_length (btrace_insn_s
, bfun
->insn
);
1777 /* An empty function segment represents a gap in the trace. We count
1778 it as one instruction. */
1781 const struct btrace_function
*next
;
1783 next
= bfun
->flow
.next
;
1796 gdb_assert (0 < end
);
1797 gdb_assert (index
< end
);
1799 /* Compute the number of instructions remaining in this segment. */
1800 space
= end
- index
;
1802 /* Advance the iterator as far as possible within this segment. */
1803 adv
= min (space
, stride
);
1808 /* Move to the next function if we're at the end of this one. */
1811 const struct btrace_function
*next
;
1813 next
= bfun
->flow
.next
;
1816 /* We stepped past the last function.
1818 Let's adjust the index to point to the last instruction in
1819 the previous function. */
1825 /* We now point to the first instruction in the new function. */
1830 /* We did make progress. */
1831 gdb_assert (adv
> 0);
1834 /* Update the iterator. */
1835 it
->function
= bfun
;
1844 btrace_insn_prev (struct btrace_insn_iterator
*it
, unsigned int stride
)
1846 const struct btrace_function
*bfun
;
1847 unsigned int index
, steps
;
1849 bfun
= it
->function
;
1857 /* Move to the previous function if we're at the start of this one. */
1860 const struct btrace_function
*prev
;
1862 prev
= bfun
->flow
.prev
;
1866 /* We point to one after the last instruction in the new function. */
1868 index
= VEC_length (btrace_insn_s
, bfun
->insn
);
1870 /* An empty function segment represents a gap in the trace. We count
1871 it as one instruction. */
1881 /* Advance the iterator as far as possible within this segment. */
1882 adv
= min (index
, stride
);
1888 /* We did make progress. */
1889 gdb_assert (adv
> 0);
1892 /* Update the iterator. */
1893 it
->function
= bfun
;
1902 btrace_insn_cmp (const struct btrace_insn_iterator
*lhs
,
1903 const struct btrace_insn_iterator
*rhs
)
1905 unsigned int lnum
, rnum
;
1907 lnum
= btrace_insn_number (lhs
);
1908 rnum
= btrace_insn_number (rhs
);
1910 /* A gap has an instruction number of zero. Things are getting more
1911 complicated if gaps are involved.
1913 We take the instruction number offset from the iterator's function.
1914 This is the number of the first instruction after the gap.
1916 This is OK as long as both lhs and rhs point to gaps. If only one of
1917 them does, we need to adjust the number based on the other's regular
1918 instruction number. Otherwise, a gap might compare equal to an
1921 if (lnum
== 0 && rnum
== 0)
1923 lnum
= lhs
->function
->insn_offset
;
1924 rnum
= rhs
->function
->insn_offset
;
1928 lnum
= lhs
->function
->insn_offset
;
1935 rnum
= rhs
->function
->insn_offset
;
1941 return (int) (lnum
- rnum
);
1947 btrace_find_insn_by_number (struct btrace_insn_iterator
*it
,
1948 const struct btrace_thread_info
*btinfo
,
1949 unsigned int number
)
1951 const struct btrace_function
*bfun
;
1952 unsigned int end
, length
;
1954 for (bfun
= btinfo
->end
; bfun
!= NULL
; bfun
= bfun
->flow
.prev
)
1957 if (bfun
->errcode
!= 0)
1960 if (bfun
->insn_offset
<= number
)
1967 length
= VEC_length (btrace_insn_s
, bfun
->insn
);
1968 gdb_assert (length
> 0);
1970 end
= bfun
->insn_offset
+ length
;
1974 it
->function
= bfun
;
1975 it
->index
= number
- bfun
->insn_offset
;
1982 const struct btrace_function
*
1983 btrace_call_get (const struct btrace_call_iterator
*it
)
1985 return it
->function
;
1991 btrace_call_number (const struct btrace_call_iterator
*it
)
1993 const struct btrace_thread_info
*btinfo
;
1994 const struct btrace_function
*bfun
;
1997 btinfo
= it
->btinfo
;
1998 bfun
= it
->function
;
2000 return bfun
->number
;
2002 /* For the end iterator, i.e. bfun == NULL, we return one more than the
2003 number of the last function. */
2005 insns
= VEC_length (btrace_insn_s
, bfun
->insn
);
2007 /* If the function contains only a single instruction (i.e. the current
2008 instruction), it will be skipped and its number is already the number
2011 return bfun
->number
;
2013 /* Otherwise, return one more than the number of the last function. */
2014 return bfun
->number
+ 1;
2020 btrace_call_begin (struct btrace_call_iterator
*it
,
2021 const struct btrace_thread_info
*btinfo
)
2023 const struct btrace_function
*bfun
;
2025 bfun
= btinfo
->begin
;
2027 error (_("No trace."));
2029 it
->btinfo
= btinfo
;
2030 it
->function
= bfun
;
2036 btrace_call_end (struct btrace_call_iterator
*it
,
2037 const struct btrace_thread_info
*btinfo
)
2039 const struct btrace_function
*bfun
;
2043 error (_("No trace."));
2045 it
->btinfo
= btinfo
;
2046 it
->function
= NULL
;
2052 btrace_call_next (struct btrace_call_iterator
*it
, unsigned int stride
)
2054 const struct btrace_function
*bfun
;
2057 bfun
= it
->function
;
2059 while (bfun
!= NULL
)
2061 const struct btrace_function
*next
;
2064 next
= bfun
->flow
.next
;
2067 /* Ignore the last function if it only contains a single
2068 (i.e. the current) instruction. */
2069 insns
= VEC_length (btrace_insn_s
, bfun
->insn
);
2074 if (stride
== steps
)
2081 it
->function
= bfun
;
2088 btrace_call_prev (struct btrace_call_iterator
*it
, unsigned int stride
)
2090 const struct btrace_thread_info
*btinfo
;
2091 const struct btrace_function
*bfun
;
2094 bfun
= it
->function
;
2101 btinfo
= it
->btinfo
;
2106 /* Ignore the last function if it only contains a single
2107 (i.e. the current) instruction. */
2108 insns
= VEC_length (btrace_insn_s
, bfun
->insn
);
2110 bfun
= bfun
->flow
.prev
;
2118 while (steps
< stride
)
2120 const struct btrace_function
*prev
;
2122 prev
= bfun
->flow
.prev
;
2130 it
->function
= bfun
;
2137 btrace_call_cmp (const struct btrace_call_iterator
*lhs
,
2138 const struct btrace_call_iterator
*rhs
)
2140 unsigned int lnum
, rnum
;
2142 lnum
= btrace_call_number (lhs
);
2143 rnum
= btrace_call_number (rhs
);
2145 return (int) (lnum
- rnum
);
2151 btrace_find_call_by_number (struct btrace_call_iterator
*it
,
2152 const struct btrace_thread_info
*btinfo
,
2153 unsigned int number
)
2155 const struct btrace_function
*bfun
;
2157 for (bfun
= btinfo
->end
; bfun
!= NULL
; bfun
= bfun
->flow
.prev
)
2161 bnum
= bfun
->number
;
2164 it
->btinfo
= btinfo
;
2165 it
->function
= bfun
;
2169 /* Functions are ordered and numbered consecutively. We could bail out
2170 earlier. On the other hand, it is very unlikely that we search for
2171 a nonexistent function. */
2180 btrace_set_insn_history (struct btrace_thread_info
*btinfo
,
2181 const struct btrace_insn_iterator
*begin
,
2182 const struct btrace_insn_iterator
*end
)
2184 if (btinfo
->insn_history
== NULL
)
2185 btinfo
->insn_history
= xzalloc (sizeof (*btinfo
->insn_history
));
2187 btinfo
->insn_history
->begin
= *begin
;
2188 btinfo
->insn_history
->end
= *end
;
2194 btrace_set_call_history (struct btrace_thread_info
*btinfo
,
2195 const struct btrace_call_iterator
*begin
,
2196 const struct btrace_call_iterator
*end
)
2198 gdb_assert (begin
->btinfo
== end
->btinfo
);
2200 if (btinfo
->call_history
== NULL
)
2201 btinfo
->call_history
= xzalloc (sizeof (*btinfo
->call_history
));
2203 btinfo
->call_history
->begin
= *begin
;
2204 btinfo
->call_history
->end
= *end
;
2210 btrace_is_replaying (struct thread_info
*tp
)
2212 return tp
->btrace
.replay
!= NULL
;
2218 btrace_is_empty (struct thread_info
*tp
)
2220 struct btrace_insn_iterator begin
, end
;
2221 struct btrace_thread_info
*btinfo
;
2223 btinfo
= &tp
->btrace
;
2225 if (btinfo
->begin
== NULL
)
2228 btrace_insn_begin (&begin
, btinfo
);
2229 btrace_insn_end (&end
, btinfo
);
2231 return btrace_insn_cmp (&begin
, &end
) == 0;
2234 /* Forward the cleanup request. */
2237 do_btrace_data_cleanup (void *arg
)
2239 btrace_data_fini (arg
);
2245 make_cleanup_btrace_data (struct btrace_data
*data
)
2247 return make_cleanup (do_btrace_data_cleanup
, data
);
2250 #if defined (HAVE_LIBIPT)
2252 /* Print a single packet. */
2255 pt_print_packet (const struct pt_packet
*packet
)
2257 switch (packet
->type
)
2260 printf_unfiltered (("[??: %x]"), packet
->type
);
2264 printf_unfiltered (("psb"));
2268 printf_unfiltered (("psbend"));
2272 printf_unfiltered (("pad"));
2276 printf_unfiltered (("tip %u: 0x%" PRIx64
""),
2277 packet
->payload
.ip
.ipc
,
2278 packet
->payload
.ip
.ip
);
2282 printf_unfiltered (("tip.pge %u: 0x%" PRIx64
""),
2283 packet
->payload
.ip
.ipc
,
2284 packet
->payload
.ip
.ip
);
2288 printf_unfiltered (("tip.pgd %u: 0x%" PRIx64
""),
2289 packet
->payload
.ip
.ipc
,
2290 packet
->payload
.ip
.ip
);
2294 printf_unfiltered (("fup %u: 0x%" PRIx64
""),
2295 packet
->payload
.ip
.ipc
,
2296 packet
->payload
.ip
.ip
);
2300 printf_unfiltered (("tnt-8 %u: 0x%" PRIx64
""),
2301 packet
->payload
.tnt
.bit_size
,
2302 packet
->payload
.tnt
.payload
);
2306 printf_unfiltered (("tnt-64 %u: 0x%" PRIx64
""),
2307 packet
->payload
.tnt
.bit_size
,
2308 packet
->payload
.tnt
.payload
);
2312 printf_unfiltered (("pip %" PRIx64
""), packet
->payload
.pip
.cr3
);
2316 printf_unfiltered (("tsc %" PRIx64
""), packet
->payload
.tsc
.tsc
);
2320 printf_unfiltered (("cbr %u"), packet
->payload
.cbr
.ratio
);
2324 switch (packet
->payload
.mode
.leaf
)
2327 printf_unfiltered (("mode %u"), packet
->payload
.mode
.leaf
);
2331 printf_unfiltered (("mode.exec%s%s"),
2332 packet
->payload
.mode
.bits
.exec
.csl
2334 packet
->payload
.mode
.bits
.exec
.csd
2335 ? (" cs.d") : (""));
2339 printf_unfiltered (("mode.tsx%s%s"),
2340 packet
->payload
.mode
.bits
.tsx
.intx
2342 packet
->payload
.mode
.bits
.tsx
.abrt
2343 ? (" abrt") : (""));
2349 printf_unfiltered (("ovf"));
2355 /* Decode packets into MAINT using DECODER. */
2358 btrace_maint_decode_pt (struct btrace_maint_info
*maint
,
2359 struct pt_packet_decoder
*decoder
)
2365 struct btrace_pt_packet packet
;
2367 errcode
= pt_pkt_sync_forward (decoder
);
2373 pt_pkt_get_offset (decoder
, &packet
.offset
);
2375 errcode
= pt_pkt_next (decoder
, &packet
.packet
,
2376 sizeof(packet
.packet
));
2380 if (maint_btrace_pt_skip_pad
== 0 || packet
.packet
.type
!= ppt_pad
)
2382 packet
.errcode
= pt_errcode (errcode
);
2383 VEC_safe_push (btrace_pt_packet_s
, maint
->variant
.pt
.packets
,
2388 if (errcode
== -pte_eos
)
2391 packet
.errcode
= pt_errcode (errcode
);
2392 VEC_safe_push (btrace_pt_packet_s
, maint
->variant
.pt
.packets
,
2395 warning (_("Error at trace offset 0x%" PRIx64
": %s."),
2396 packet
.offset
, pt_errstr (packet
.errcode
));
2399 if (errcode
!= -pte_eos
)
2400 warning (_("Failed to synchronize onto the Intel(R) Processor Trace "
2401 "stream: %s."), pt_errstr (pt_errcode (errcode
)));
2404 /* Update the packet history in BTINFO. */
2407 btrace_maint_update_pt_packets (struct btrace_thread_info
*btinfo
)
2409 volatile struct gdb_exception except
;
2410 struct pt_packet_decoder
*decoder
;
2411 struct btrace_data_pt
*pt
;
2412 struct pt_config config
;
2415 pt
= &btinfo
->data
.variant
.pt
;
2417 /* Nothing to do if there is no trace. */
2421 memset (&config
, 0, sizeof(config
));
2423 config
.size
= sizeof (config
);
2424 config
.begin
= pt
->data
;
2425 config
.end
= pt
->data
+ pt
->size
;
2427 config
.cpu
.vendor
= pt_translate_cpu_vendor (pt
->config
.cpu
.vendor
);
2428 config
.cpu
.family
= pt
->config
.cpu
.family
;
2429 config
.cpu
.model
= pt
->config
.cpu
.model
;
2430 config
.cpu
.stepping
= pt
->config
.cpu
.stepping
;
2432 errcode
= pt_cpu_errata (&config
.errata
, &config
.cpu
);
2434 error (_("Failed to configure the Intel(R) Processor Trace decoder: %s."),
2435 pt_errstr (pt_errcode (errcode
)));
2437 decoder
= pt_pkt_alloc_decoder (&config
);
2438 if (decoder
== NULL
)
2439 error (_("Failed to allocate the Intel(R) Processor Trace decoder."));
2443 btrace_maint_decode_pt (&btinfo
->maint
, decoder
);
2445 CATCH (except
, RETURN_MASK_ALL
)
2447 pt_pkt_free_decoder (decoder
);
2449 if (except
.reason
< 0)
2450 throw_exception (except
);
2454 pt_pkt_free_decoder (decoder
);
2457 #endif /* !defined (HAVE_LIBIPT) */
2459 /* Update the packet maintenance information for BTINFO and store the
2460 low and high bounds into BEGIN and END, respectively.
2461 Store the current iterator state into FROM and TO. */
2464 btrace_maint_update_packets (struct btrace_thread_info
*btinfo
,
2465 unsigned int *begin
, unsigned int *end
,
2466 unsigned int *from
, unsigned int *to
)
2468 switch (btinfo
->data
.format
)
2477 case BTRACE_FORMAT_BTS
:
2478 /* Nothing to do - we operate directly on BTINFO->DATA. */
2480 *end
= VEC_length (btrace_block_s
, btinfo
->data
.variant
.bts
.blocks
);
2481 *from
= btinfo
->maint
.variant
.bts
.packet_history
.begin
;
2482 *to
= btinfo
->maint
.variant
.bts
.packet_history
.end
;
2485 #if defined (HAVE_LIBIPT)
2486 case BTRACE_FORMAT_PT
:
2487 if (VEC_empty (btrace_pt_packet_s
, btinfo
->maint
.variant
.pt
.packets
))
2488 btrace_maint_update_pt_packets (btinfo
);
2491 *end
= VEC_length (btrace_pt_packet_s
, btinfo
->maint
.variant
.pt
.packets
);
2492 *from
= btinfo
->maint
.variant
.pt
.packet_history
.begin
;
2493 *to
= btinfo
->maint
.variant
.pt
.packet_history
.end
;
2495 #endif /* defined (HAVE_LIBIPT) */
2499 /* Print packets in BTINFO from BEGIN (inclusive) until END (exclusive) and
2500 update the current iterator position. */
2503 btrace_maint_print_packets (struct btrace_thread_info
*btinfo
,
2504 unsigned int begin
, unsigned int end
)
2506 switch (btinfo
->data
.format
)
2511 case BTRACE_FORMAT_BTS
:
2513 VEC (btrace_block_s
) *blocks
;
2516 blocks
= btinfo
->data
.variant
.bts
.blocks
;
2517 for (blk
= begin
; blk
< end
; ++blk
)
2519 const btrace_block_s
*block
;
2521 block
= VEC_index (btrace_block_s
, blocks
, blk
);
2523 printf_unfiltered ("%u\tbegin: %s, end: %s\n", blk
,
2524 core_addr_to_string_nz (block
->begin
),
2525 core_addr_to_string_nz (block
->end
));
2528 btinfo
->maint
.variant
.bts
.packet_history
.begin
= begin
;
2529 btinfo
->maint
.variant
.bts
.packet_history
.end
= end
;
2533 #if defined (HAVE_LIBIPT)
2534 case BTRACE_FORMAT_PT
:
2536 VEC (btrace_pt_packet_s
) *packets
;
2539 packets
= btinfo
->maint
.variant
.pt
.packets
;
2540 for (pkt
= begin
; pkt
< end
; ++pkt
)
2542 const struct btrace_pt_packet
*packet
;
2544 packet
= VEC_index (btrace_pt_packet_s
, packets
, pkt
);
2546 printf_unfiltered ("%u\t", pkt
);
2547 printf_unfiltered ("0x%" PRIx64
"\t", packet
->offset
);
2549 if (packet
->errcode
== pte_ok
)
2550 pt_print_packet (&packet
->packet
);
2552 printf_unfiltered ("[error: %s]", pt_errstr (packet
->errcode
));
2554 printf_unfiltered ("\n");
2557 btinfo
->maint
.variant
.pt
.packet_history
.begin
= begin
;
2558 btinfo
->maint
.variant
.pt
.packet_history
.end
= end
;
2561 #endif /* defined (HAVE_LIBIPT) */
2565 /* Read a number from an argument string. */
2568 get_uint (char **arg
)
2570 char *begin
, *end
, *pos
;
2571 unsigned long number
;
2574 pos
= skip_spaces (begin
);
2576 if (!isdigit (*pos
))
2577 error (_("Expected positive number, got: %s."), pos
);
2579 number
= strtoul (pos
, &end
, 10);
2580 if (number
> UINT_MAX
)
2581 error (_("Number too big."));
2583 *arg
+= (end
- begin
);
2585 return (unsigned int) number
;
2588 /* Read a context size from an argument string. */
2591 get_context_size (char **arg
)
2596 pos
= skip_spaces (*arg
);
2598 if (!isdigit (*pos
))
2599 error (_("Expected positive number, got: %s."), pos
);
2601 return strtol (pos
, arg
, 10);
2604 /* Complain about junk at the end of an argument string. */
2607 no_chunk (char *arg
)
2610 error (_("Junk after argument: %s."), arg
);
2613 /* The "maintenance btrace packet-history" command. */
2616 maint_btrace_packet_history_cmd (char *arg
, int from_tty
)
2618 struct btrace_thread_info
*btinfo
;
2619 struct thread_info
*tp
;
2620 unsigned int size
, begin
, end
, from
, to
;
2622 tp
= find_thread_ptid (inferior_ptid
);
2624 error (_("No thread."));
2627 btinfo
= &tp
->btrace
;
2629 btrace_maint_update_packets (btinfo
, &begin
, &end
, &from
, &to
);
2632 printf_unfiltered (_("No trace.\n"));
2636 if (arg
== NULL
|| *arg
== 0 || strcmp (arg
, "+") == 0)
2640 if (end
- from
< size
)
2644 else if (strcmp (arg
, "-") == 0)
2648 if (to
- begin
< size
)
2654 from
= get_uint (&arg
);
2656 error (_("'%u' is out of range."), from
);
2658 arg
= skip_spaces (arg
);
2661 arg
= skip_spaces (++arg
);
2666 size
= get_context_size (&arg
);
2670 if (end
- from
< size
)
2674 else if (*arg
== '-')
2677 size
= get_context_size (&arg
);
2681 /* Include the packet given as first argument. */
2685 if (to
- begin
< size
)
2691 to
= get_uint (&arg
);
2693 /* Include the packet at the second argument and silently
2694 truncate the range. */
2707 if (end
- from
< size
)
2715 btrace_maint_print_packets (btinfo
, from
, to
);
2718 /* The "maintenance btrace clear-packet-history" command. */
2721 maint_btrace_clear_packet_history_cmd (char *args
, int from_tty
)
2723 struct btrace_thread_info
*btinfo
;
2724 struct thread_info
*tp
;
2726 if (args
!= NULL
&& *args
!= 0)
2727 error (_("Invalid argument."));
2729 tp
= find_thread_ptid (inferior_ptid
);
2731 error (_("No thread."));
2733 btinfo
= &tp
->btrace
;
2735 /* Must clear the maint data before - it depends on BTINFO->DATA. */
2736 btrace_maint_clear (btinfo
);
2737 btrace_data_clear (&btinfo
->data
);
2740 /* The "maintenance btrace clear" command. */
2743 maint_btrace_clear_cmd (char *args
, int from_tty
)
2745 struct btrace_thread_info
*btinfo
;
2746 struct thread_info
*tp
;
2748 if (args
!= NULL
&& *args
!= 0)
2749 error (_("Invalid argument."));
2751 tp
= find_thread_ptid (inferior_ptid
);
2753 error (_("No thread."));
2758 /* The "maintenance btrace" command. */
2761 maint_btrace_cmd (char *args
, int from_tty
)
2763 help_list (maint_btrace_cmdlist
, "maintenance btrace ", all_commands
,
2767 /* The "maintenance set btrace" command. */
2770 maint_btrace_set_cmd (char *args
, int from_tty
)
2772 help_list (maint_btrace_set_cmdlist
, "maintenance set btrace ", all_commands
,
2776 /* The "maintenance show btrace" command. */
2779 maint_btrace_show_cmd (char *args
, int from_tty
)
2781 help_list (maint_btrace_show_cmdlist
, "maintenance show btrace ",
2782 all_commands
, gdb_stdout
);
2785 /* The "maintenance set btrace pt" command. */
2788 maint_btrace_pt_set_cmd (char *args
, int from_tty
)
2790 help_list (maint_btrace_pt_set_cmdlist
, "maintenance set btrace pt ",
2791 all_commands
, gdb_stdout
);
2794 /* The "maintenance show btrace pt" command. */
2797 maint_btrace_pt_show_cmd (char *args
, int from_tty
)
2799 help_list (maint_btrace_pt_show_cmdlist
, "maintenance show btrace pt ",
2800 all_commands
, gdb_stdout
);
2803 /* The "maintenance info btrace" command. */
2806 maint_info_btrace_cmd (char *args
, int from_tty
)
2808 struct btrace_thread_info
*btinfo
;
2809 struct thread_info
*tp
;
2810 const struct btrace_config
*conf
;
2812 if (args
!= NULL
&& *args
!= 0)
2813 error (_("Invalid argument."));
2815 tp
= find_thread_ptid (inferior_ptid
);
2817 error (_("No thread."));
2819 btinfo
= &tp
->btrace
;
2821 conf
= btrace_conf (btinfo
);
2823 error (_("No btrace configuration."));
2825 printf_unfiltered (_("Format: %s.\n"),
2826 btrace_format_string (conf
->format
));
2828 switch (conf
->format
)
2833 case BTRACE_FORMAT_BTS
:
2834 printf_unfiltered (_("Number of packets: %u.\n"),
2835 VEC_length (btrace_block_s
,
2836 btinfo
->data
.variant
.bts
.blocks
));
2839 #if defined (HAVE_LIBIPT)
2840 case BTRACE_FORMAT_PT
:
2842 struct pt_version version
;
2844 version
= pt_library_version ();
2845 printf_unfiltered (_("Version: %u.%u.%u%s.\n"), version
.major
,
2846 version
.minor
, version
.build
,
2847 version
.ext
!= NULL
? version
.ext
: "");
2849 btrace_maint_update_pt_packets (btinfo
);
2850 printf_unfiltered (_("Number of packets: %u.\n"),
2851 VEC_length (btrace_pt_packet_s
,
2852 btinfo
->maint
.variant
.pt
.packets
));
2855 #endif /* defined (HAVE_LIBIPT) */
2859 /* The "maint show btrace pt skip-pad" show value function. */
2862 show_maint_btrace_pt_skip_pad (struct ui_file
*file
, int from_tty
,
2863 struct cmd_list_element
*c
,
2866 fprintf_filtered (file
, _("Skip PAD packets is %s.\n"), value
);
2870 /* Initialize btrace maintenance commands. */
2872 void _initialize_btrace (void);
2874 _initialize_btrace (void)
2876 add_cmd ("btrace", class_maintenance
, maint_info_btrace_cmd
,
2877 _("Info about branch tracing data."), &maintenanceinfolist
);
2879 add_prefix_cmd ("btrace", class_maintenance
, maint_btrace_cmd
,
2880 _("Branch tracing maintenance commands."),
2881 &maint_btrace_cmdlist
, "maintenance btrace ",
2882 0, &maintenancelist
);
2884 add_prefix_cmd ("btrace", class_maintenance
, maint_btrace_set_cmd
, _("\
2885 Set branch tracing specific variables."),
2886 &maint_btrace_set_cmdlist
, "maintenance set btrace ",
2887 0, &maintenance_set_cmdlist
);
2889 add_prefix_cmd ("pt", class_maintenance
, maint_btrace_pt_set_cmd
, _("\
2890 Set Intel(R) Processor Trace specific variables."),
2891 &maint_btrace_pt_set_cmdlist
, "maintenance set btrace pt ",
2892 0, &maint_btrace_set_cmdlist
);
2894 add_prefix_cmd ("btrace", class_maintenance
, maint_btrace_show_cmd
, _("\
2895 Show branch tracing specific variables."),
2896 &maint_btrace_show_cmdlist
, "maintenance show btrace ",
2897 0, &maintenance_show_cmdlist
);
2899 add_prefix_cmd ("pt", class_maintenance
, maint_btrace_pt_show_cmd
, _("\
2900 Show Intel(R) Processor Trace specific variables."),
2901 &maint_btrace_pt_show_cmdlist
, "maintenance show btrace pt ",
2902 0, &maint_btrace_show_cmdlist
);
2904 add_setshow_boolean_cmd ("skip-pad", class_maintenance
,
2905 &maint_btrace_pt_skip_pad
, _("\
2906 Set whether PAD packets should be skipped in the btrace packet history."), _("\
2907 Show whether PAD packets should be skipped in the btrace packet history."),_("\
2908 When enabled, PAD packets are ignored in the btrace packet history."),
2909 NULL
, show_maint_btrace_pt_skip_pad
,
2910 &maint_btrace_pt_set_cmdlist
,
2911 &maint_btrace_pt_show_cmdlist
);
2913 add_cmd ("packet-history", class_maintenance
, maint_btrace_packet_history_cmd
,
2914 _("Print the raw branch tracing data.\n\
2915 With no argument, print ten more packets after the previous ten-line print.\n\
2916 With '-' as argument print ten packets before a previous ten-line print.\n\
2917 One argument specifies the starting packet of a ten-line print.\n\
2918 Two arguments with comma between specify starting and ending packets to \
2920 Preceded with '+'/'-' the second argument specifies the distance from the \
2922 &maint_btrace_cmdlist
);
2924 add_cmd ("clear-packet-history", class_maintenance
,
2925 maint_btrace_clear_packet_history_cmd
,
2926 _("Clears the branch tracing packet history.\n\
2927 Discards the raw branch tracing data but not the execution history data.\n\
2929 &maint_btrace_cmdlist
);
2931 add_cmd ("clear", class_maintenance
, maint_btrace_clear_cmd
,
2932 _("Clears the branch tracing data.\n\
2933 Discards the raw branch tracing data and the execution history data.\n\
2934 The next 'record' command will fetch the branch tracing data anew.\n\
2936 &maint_btrace_cmdlist
);