[deliverable/binutils-gdb.git] / gdb / btrace.h

/* Branch trace support for GDB, the GNU debugger.

   Copyright (C) 2013-2015 Free Software Foundation, Inc.

   Contributed by Intel Corp. <markus.t.metzger@intel.com>.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef BTRACE_H
#define BTRACE_H

/* Branch tracing (btrace) is a per-thread control-flow execution trace of the
   inferior.  For presentation purposes, the branch trace is represented as a
   list of sequential control-flow blocks, one such list per thread.  */

#include "btrace-common.h"

struct thread_info;
struct btrace_function;

/* A branch trace instruction.

   This represents a single instruction in a branch trace.  */
struct btrace_insn
{
  /* The address of this instruction.  */
  CORE_ADDR pc;
};

/* A vector of branch trace instructions.  */
typedef struct btrace_insn btrace_insn_s;
DEF_VEC_O (btrace_insn_s);

/* A doubly-linked list of branch trace function segments.  */
struct btrace_func_link
{
  struct btrace_function *prev;
  struct btrace_function *next;
};

/* Flags for btrace function segments.  */
enum btrace_function_flag
{
  /* The 'up' link interpretation.
     If set, it points to the function segment we returned to.
     If clear, it points to the function segment we called from.  */
  BFUN_UP_LINKS_TO_RET = (1 << 0),

  /* The 'up' link points to a tail call.  This obviously only makes sense
     if bfun_up_links_to_ret is clear.  */
  BFUN_UP_LINKS_TO_TAILCALL = (1 << 1)
};

/* A branch trace function segment.

   This represents a function segment in a branch trace, i.e. a consecutive
   number of instructions belonging to the same function.

   We do not allow function segments without any instructions.  */
struct btrace_function
{
  /* The full and minimal symbol for the function.  Both may be NULL.  */
  struct minimal_symbol *msym;
  struct symbol *sym;

  /* The previous and next segment belonging to the same function.
     If a function calls another function, the former will have at least
     two segments: one before the call and another after the return.  */
  struct btrace_func_link segment;

  /* The previous and next function in control flow order.  */
  struct btrace_func_link flow;

  /* The directly preceding function segment in a (fake) call stack.  */
  struct btrace_function *up;

  /* The instructions in this function segment.
     The instruction vector will never be empty.  */
  VEC (btrace_insn_s) *insn;

  /* The instruction number offset for the first instruction in this
     function segment.  */
  unsigned int insn_offset;

  /* The function number in control-flow order.  */
  unsigned int number;

  /* The function level in a back trace across the entire branch trace.
     A caller's level is one lower than the level of its callee.

     Levels can be negative if we see returns for which we have not seen
     the corresponding calls.  The branch trace thread information provides
     a fixup to normalize function levels so the smallest level is zero.  */
  int level;

  /* The source line range of this function segment (both inclusive).  */
  int lbegin, lend;

  /* A bit-vector of btrace_function_flag.  */
  enum btrace_function_flag flags;
};

/* A branch trace instruction iterator.  */
struct btrace_insn_iterator
{
  /* The branch trace function segment containing the instruction.
     Will never be NULL.  */
  const struct btrace_function *function;

  /* The index into the function segment's instruction vector.  */
  unsigned int index;
};

/* A branch trace function call iterator.  */
struct btrace_call_iterator
{
  /* The branch trace information for this thread.  Will never be NULL.  */
  const struct btrace_thread_info *btinfo;

  /* The branch trace function segment.
     This will be NULL for the iterator pointing to the end of the trace.  */
  const struct btrace_function *function;
};

/* Branch trace iteration state for "record instruction-history".  */
struct btrace_insn_history
{
  /* The branch trace instruction range from BEGIN (inclusive) to
     END (exclusive) that has been covered last time.  */
  struct btrace_insn_iterator begin;
  struct btrace_insn_iterator end;
};

/* Branch trace iteration state for "record function-call-history".  */
struct btrace_call_history
{
  /* The branch trace function range from BEGIN (inclusive) to END (exclusive)
     that has been covered last time.  */
  struct btrace_call_iterator begin;
  struct btrace_call_iterator end;
};

/* Branch trace thread flags.  */
enum btrace_thread_flag
{
  /* The thread is to be stepped forwards.  */
  BTHR_STEP = (1 << 0),

  /* The thread is to be stepped backwards.  */
  BTHR_RSTEP = (1 << 1),

  /* The thread is to be continued forwards.  */
  BTHR_CONT = (1 << 2),

  /* The thread is to be continued backwards.  */
  BTHR_RCONT = (1 << 3),

  /* The thread is to be moved.  */
  BTHR_MOVE = (BTHR_STEP | BTHR_RSTEP | BTHR_CONT | BTHR_RCONT)
};

/* Branch trace information per thread.

   This represents the branch trace configuration as well as the entry point
   into the branch trace data.  For the latter, it also contains the index into
   an array of branch trace blocks used for iterating though the branch trace
   blocks of a thread.  */
struct btrace_thread_info
{
  /* The target branch trace information for this thread.

     This contains the branch trace configuration as well as any
     target-specific information necessary for implementing branch tracing on
     the underlying architecture.  */
  struct btrace_target_info *target;

  /* The current branch trace for this thread (both inclusive).

     The last instruction of END is the current instruction, which is not
     part of the execution history.
     Both will be NULL if there is no branch trace available.  If there is
     branch trace available, both will be non-NULL.  */
  struct btrace_function *begin;
  struct btrace_function *end;

  /* The function level offset.  When added to each function's LEVEL,
     this normalizes the function levels such that the smallest level
     becomes zero.  */
  int level;

  /* A bit-vector of btrace_thread_flag.  */
  enum btrace_thread_flag flags;

  /* The instruction history iterator.  */
  struct btrace_insn_history *insn_history;

  /* The function call history iterator.  */
  struct btrace_call_history *call_history;

  /* The current replay position.  NULL if not replaying.  */
  struct btrace_insn_iterator *replay;
};

/* Enable branch tracing for a thread.  */
extern void btrace_enable (struct thread_info *tp);

/* Disable branch tracing for a thread.
   This will also delete the current branch trace data.  */
extern void btrace_disable (struct thread_info *);

/* Disable branch tracing for a thread during teardown.
   This is similar to btrace_disable, except that it will use
   target_teardown_btrace instead of target_disable_btrace.  */
extern void btrace_teardown (struct thread_info *);

/* Fetch the branch trace for a single thread.  */
extern void btrace_fetch (struct thread_info *);

/* Clear the branch trace for a single thread.  */
extern void btrace_clear (struct thread_info *);

/* Clear the branch trace for all threads when an object file goes away.  */
extern void btrace_free_objfile (struct objfile *);

/* Parse a branch trace xml document into a block vector.  */
extern VEC (btrace_block_s) *parse_xml_btrace (const char*);

/* Dereference a branch trace instruction iterator.  Return a pointer to the
   instruction the iterator points to.  */
extern const struct btrace_insn *
  btrace_insn_get (const struct btrace_insn_iterator *);

/* Return the instruction number for a branch trace iterator.
   Returns one past the maximum instruction number for the end iterator.
   Returns zero if the iterator does not point to a valid instruction.  */
extern unsigned int btrace_insn_number (const struct btrace_insn_iterator *);

/* Initialize a branch trace instruction iterator to point to the begin/end of
   the branch trace.  Throws an error if there is no branch trace.  */
extern void btrace_insn_begin (struct btrace_insn_iterator *,
			       const struct btrace_thread_info *);
extern void btrace_insn_end (struct btrace_insn_iterator *,
			     const struct btrace_thread_info *);

/* Increment/decrement a branch trace instruction iterator by at most STRIDE
   instructions.  Return the number of instructions by which the instruction
   iterator has been advanced.
   Returns zero, if the operation failed or STRIDE had been zero.  */
extern unsigned int btrace_insn_next (struct btrace_insn_iterator *,
				      unsigned int stride);
extern unsigned int btrace_insn_prev (struct btrace_insn_iterator *,
				      unsigned int stride);

/* Compare two branch trace instruction iterators.
   Return a negative number if LHS < RHS.
   Return zero if LHS == RHS.
   Return a positive number if LHS > RHS.  */
extern int btrace_insn_cmp (const struct btrace_insn_iterator *lhs,
			    const struct btrace_insn_iterator *rhs);

/* Find an instruction in the function branch trace by its number.
   If the instruction is found, initialize the branch trace instruction
   iterator to point to this instruction and return non-zero.
   Return zero otherwise.  */
extern int btrace_find_insn_by_number (struct btrace_insn_iterator *,
				       const struct btrace_thread_info *,
				       unsigned int number);

/* Dereference a branch trace call iterator.  Return a pointer to the
   function the iterator points to or NULL if the interator points past
   the end of the branch trace.  */
extern const struct btrace_function *
  btrace_call_get (const struct btrace_call_iterator *);

/* Return the function number for a branch trace call iterator.
   Returns one past the maximum function number for the end iterator.
   Returns zero if the iterator does not point to a valid function.  */
extern unsigned int btrace_call_number (const struct btrace_call_iterator *);

/* Initialize a branch trace call iterator to point to the begin/end of
   the branch trace.  Throws an error if there is no branch trace.  */
extern void btrace_call_begin (struct btrace_call_iterator *,
			       const struct btrace_thread_info *);
extern void btrace_call_end (struct btrace_call_iterator *,
			     const struct btrace_thread_info *);

/* Increment/decrement a branch trace call iterator by at most STRIDE function
   segments.  Return the number of function segments by which the call
   iterator has been advanced.
   Returns zero, if the operation failed or STRIDE had been zero.  */
extern unsigned int btrace_call_next (struct btrace_call_iterator *,
				      unsigned int stride);
extern unsigned int btrace_call_prev (struct btrace_call_iterator *,
				      unsigned int stride);

/* Compare two branch trace call iterators.
   Return a negative number if LHS < RHS.
   Return zero if LHS == RHS.
   Return a positive number if LHS > RHS.  */
extern int btrace_call_cmp (const struct btrace_call_iterator *lhs,
			    const struct btrace_call_iterator *rhs);

/* Find a function in the function branch trace by its NUMBER.
   If the function is found, initialize the branch trace call
   iterator to point to this function and return non-zero.
   Return zero otherwise.  */
extern int btrace_find_call_by_number (struct btrace_call_iterator *,
				       const struct btrace_thread_info *,
				       unsigned int number);

/* Set the branch trace instruction history from BEGIN (inclusive) to
   END (exclusive).  */
extern void btrace_set_insn_history (struct btrace_thread_info *,
				     const struct btrace_insn_iterator *begin,
				     const struct btrace_insn_iterator *end);

/* Set the branch trace function call history from BEGIN (inclusive) to
   END (exclusive).  */
extern void btrace_set_call_history (struct btrace_thread_info *,
				     const struct btrace_call_iterator *begin,
				     const struct btrace_call_iterator *end);

/* Determine if branch tracing is currently replaying TP.  */
extern int btrace_is_replaying (struct thread_info *tp);

/* Return non-zero if the branch trace for TP is empty; zero otherwise.  */
extern int btrace_is_empty (struct thread_info *tp);


#endif /* BTRACE_H */
Commit	Line	Data
02d27625 MM	1	/* Branch trace support for GDB, the GNU debugger.
02d27625 MM	2
32d0add0	3	Copyright (C) 2013-2015 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"
	30
	31	struct thread_info;
23a7fe75	32	struct btrace_function;
02d27625 MM	33
	34	/* A branch trace instruction.
	35
	36	This represents a single instruction in a branch trace. */
23a7fe75	37	struct btrace_insn
02d27625 MM	38	{
	39	/* The address of this instruction. */
	40	CORE_ADDR pc;
	41	};
	42
23a7fe75 MM	43	/* A vector of branch trace instructions. */
	44	typedef struct btrace_insn btrace_insn_s;
	45	DEF_VEC_O (btrace_insn_s);
	46
	47	/* A doubly-linked list of branch trace function segments. */
	48	struct btrace_func_link
	49	{
	50	struct btrace_function *prev;
	51	struct btrace_function *next;
	52	};
	53
	54	/* Flags for btrace function segments. */
	55	enum btrace_function_flag
	56	{
	57	/* The 'up' link interpretation.
	58	If set, it points to the function segment we returned to.
	59	If clear, it points to the function segment we called from. */
	60	BFUN_UP_LINKS_TO_RET = (1 << 0),
	61
	62	/* The 'up' link points to a tail call. This obviously only makes sense
	63	if bfun_up_links_to_ret is clear. */
	64	BFUN_UP_LINKS_TO_TAILCALL = (1 << 1)
	65	};
	66
	67	/* A branch trace function segment.
02d27625 MM	68
02d27625 MM	69	This represents a function segment in a branch trace, i.e. a consecutive
23a7fe75 MM	70	number of instructions belonging to the same function.
	71
	72	We do not allow function segments without any instructions. */
	73	struct btrace_function
02d27625	74	{
23a7fe75	75	/* The full and minimal symbol for the function. Both may be NULL. */
02d27625 MM	76	struct minimal_symbol *msym;
	77	struct symbol *sym;
	78
23a7fe75 MM	79	/* The previous and next segment belonging to the same function.
	80	If a function calls another function, the former will have at least
	81	two segments: one before the call and another after the return. */
	82	struct btrace_func_link segment;
	83
	84	/* The previous and next function in control flow order. */
	85	struct btrace_func_link flow;
	86
	87	/* The directly preceding function segment in a (fake) call stack. */
	88	struct btrace_function *up;
	89
	90	/* The instructions in this function segment.
	91	The instruction vector will never be empty. */
	92	VEC (btrace_insn_s) *insn;
	93
	94	/* The instruction number offset for the first instruction in this
	95	function segment. */
	96	unsigned int insn_offset;
	97
	98	/* The function number in control-flow order. */
	99	unsigned int number;
	100
	101	/* The function level in a back trace across the entire branch trace.
	102	A caller's level is one lower than the level of its callee.
	103
	104	Levels can be negative if we see returns for which we have not seen
	105	the corresponding calls. The branch trace thread information provides
	106	a fixup to normalize function levels so the smallest level is zero. */
	107	int level;
	108
02d27625 MM	109	/* The source line range of this function segment (both inclusive). */
	110	int lbegin, lend;
	111
23a7fe75 MM	112	/* A bit-vector of btrace_function_flag. */
23a7fe75 MM	113	enum btrace_function_flag flags;
02d27625 MM	114	};
02d27625 MM	115
23a7fe75 MM	116	/* A branch trace instruction iterator. */
	117	struct btrace_insn_iterator
	118	{
	119	/* The branch trace function segment containing the instruction.
	120	Will never be NULL. */
	121	const struct btrace_function *function;
02d27625	122
23a7fe75 MM	123	/* The index into the function segment's instruction vector. */
	124	unsigned int index;
	125	};
02d27625	126
23a7fe75 MM	127	/* A branch trace function call iterator. */
	128	struct btrace_call_iterator
	129	{
	130	/* The branch trace information for this thread. Will never be NULL. */
	131	const struct btrace_thread_info *btinfo;
	132
	133	/* The branch trace function segment.
	134	This will be NULL for the iterator pointing to the end of the trace. */
	135	const struct btrace_function *function;
	136	};
02d27625 MM	137
02d27625 MM	138	/* Branch trace iteration state for "record instruction-history". */
23a7fe75	139	struct btrace_insn_history
02d27625	140	{
23a7fe75 MM	141	/* The branch trace instruction range from BEGIN (inclusive) to
	142	END (exclusive) that has been covered last time. */
	143	struct btrace_insn_iterator begin;
	144	struct btrace_insn_iterator end;
02d27625 MM	145	};
	146
	147	/* Branch trace iteration state for "record function-call-history". */
23a7fe75	148	struct btrace_call_history
02d27625	149	{
23a7fe75 MM	150	/* The branch trace function range from BEGIN (inclusive) to END (exclusive)
	151	that has been covered last time. */
	152	struct btrace_call_iterator begin;
	153	struct btrace_call_iterator end;
02d27625 MM	154	};
02d27625 MM	155
52834460 MM	156	/* Branch trace thread flags. */
	157	enum btrace_thread_flag
	158	{
	159	/* The thread is to be stepped forwards. */
	160	BTHR_STEP = (1 << 0),
	161
	162	/* The thread is to be stepped backwards. */
	163	BTHR_RSTEP = (1 << 1),
	164
	165	/* The thread is to be continued forwards. */
	166	BTHR_CONT = (1 << 2),
	167
	168	/* The thread is to be continued backwards. */
	169	BTHR_RCONT = (1 << 3),
	170
	171	/* The thread is to be moved. */
	172	BTHR_MOVE = (BTHR_STEP \| BTHR_RSTEP \| BTHR_CONT \| BTHR_RCONT)
	173	};
	174
02d27625 MM	175	/* Branch trace information per thread.
	176
	177	This represents the branch trace configuration as well as the entry point
	178	into the branch trace data. For the latter, it also contains the index into
	179	an array of branch trace blocks used for iterating though the branch trace
	180	blocks of a thread. */
	181	struct btrace_thread_info
	182	{
	183	/* The target branch trace information for this thread.
	184
	185	This contains the branch trace configuration as well as any
	186	target-specific information necessary for implementing branch tracing on
	187	the underlying architecture. */
	188	struct btrace_target_info *target;
	189
23a7fe75 MM	190	/* The current branch trace for this thread (both inclusive).
	191
	192	The last instruction of END is the current instruction, which is not
	193	part of the execution history.
	194	Both will be NULL if there is no branch trace available. If there is
	195	branch trace available, both will be non-NULL. */
	196	struct btrace_function *begin;
	197	struct btrace_function *end;
	198
	199	/* The function level offset. When added to each function's LEVEL,
	200	this normalizes the function levels such that the smallest level
	201	becomes zero. */
	202	int level;
02d27625	203
52834460 MM	204	/* A bit-vector of btrace_thread_flag. */
	205	enum btrace_thread_flag flags;
	206
02d27625	207	/* The instruction history iterator. */
23a7fe75	208	struct btrace_insn_history *insn_history;
02d27625 MM	209
02d27625 MM	210	/* The function call history iterator. */
23a7fe75	211	struct btrace_call_history *call_history;
07bbe694 MM	212
	213	/* The current replay position. NULL if not replaying. */
	214	struct btrace_insn_iterator *replay;
02d27625 MM	215	};
	216
	217	/* Enable branch tracing for a thread. */
	218	extern void btrace_enable (struct thread_info *tp);
	219
	220	/* Disable branch tracing for a thread.
	221	This will also delete the current branch trace data. */
	222	extern void btrace_disable (struct thread_info *);
	223
	224	/* Disable branch tracing for a thread during teardown.
	225	This is similar to btrace_disable, except that it will use
	226	target_teardown_btrace instead of target_disable_btrace. */
	227	extern void btrace_teardown (struct thread_info *);
	228
	229	/* Fetch the branch trace for a single thread. */
	230	extern void btrace_fetch (struct thread_info *);
	231
	232	/* Clear the branch trace for a single thread. */
	233	extern void btrace_clear (struct thread_info *);
	234
	235	/* Clear the branch trace for all threads when an object file goes away. */
	236	extern void btrace_free_objfile (struct objfile *);
	237
c12a2917 MM	238	/* Parse a branch trace xml document into a block vector. */
	239	extern VEC (btrace_block_s) parse_xml_btrace (const char);
	240
23a7fe75 MM	241	/* Dereference a branch trace instruction iterator. Return a pointer to the
	242	instruction the iterator points to. */
	243	extern const struct btrace_insn *
	244	btrace_insn_get (const struct btrace_insn_iterator *);
	245
	246	/* Return the instruction number for a branch trace iterator.
	247	Returns one past the maximum instruction number for the end iterator.
	248	Returns zero if the iterator does not point to a valid instruction. */
	249	extern unsigned int btrace_insn_number (const struct btrace_insn_iterator *);
	250
	251	/* Initialize a branch trace instruction iterator to point to the begin/end of
	252	the branch trace. Throws an error if there is no branch trace. */
	253	extern void btrace_insn_begin (struct btrace_insn_iterator *,
	254	const struct btrace_thread_info *);
	255	extern void btrace_insn_end (struct btrace_insn_iterator *,
	256	const struct btrace_thread_info *);
	257
	258	/* Increment/decrement a branch trace instruction iterator by at most STRIDE
	259	instructions. Return the number of instructions by which the instruction
	260	iterator has been advanced.
	261	Returns zero, if the operation failed or STRIDE had been zero. */
	262	extern unsigned int btrace_insn_next (struct btrace_insn_iterator *,
	263	unsigned int stride);
	264	extern unsigned int btrace_insn_prev (struct btrace_insn_iterator *,
	265	unsigned int stride);
	266
	267	/* Compare two branch trace instruction iterators.
	268	Return a negative number if LHS < RHS.
	269	Return zero if LHS == RHS.
	270	Return a positive number if LHS > RHS. */
	271	extern int btrace_insn_cmp (const struct btrace_insn_iterator *lhs,
	272	const struct btrace_insn_iterator *rhs);
	273
	274	/* Find an instruction in the function branch trace by its number.
	275	If the instruction is found, initialize the branch trace instruction
	276	iterator to point to this instruction and return non-zero.
	277	Return zero otherwise. */
	278	extern int btrace_find_insn_by_number (struct btrace_insn_iterator *,
	279	const struct btrace_thread_info *,
	280	unsigned int number);
	281
	282	/* Dereference a branch trace call iterator. Return a pointer to the
	283	function the iterator points to or NULL if the interator points past
	284	the end of the branch trace. */
	285	extern const struct btrace_function *
	286	btrace_call_get (const struct btrace_call_iterator *);
	287
	288	/* Return the function number for a branch trace call iterator.
	289	Returns one past the maximum function number for the end iterator.
	290	Returns zero if the iterator does not point to a valid function. */
	291	extern unsigned int btrace_call_number (const struct btrace_call_iterator *);
	292
	293	/* Initialize a branch trace call iterator to point to the begin/end of
	294	the branch trace. Throws an error if there is no branch trace. */
	295	extern void btrace_call_begin (struct btrace_call_iterator *,
	296	const struct btrace_thread_info *);
	297	extern void btrace_call_end (struct btrace_call_iterator *,
	298	const struct btrace_thread_info *);
	299
	300	/* Increment/decrement a branch trace call iterator by at most STRIDE function
	301	segments. Return the number of function segments by which the call
	302	iterator has been advanced.
	303	Returns zero, if the operation failed or STRIDE had been zero. */
	304	extern unsigned int btrace_call_next (struct btrace_call_iterator *,
305	unsigned int stride);
306	extern unsigned int btrace_call_prev (struct btrace_call_iterator *,
307	unsigned int stride);
308
309	/* Compare two branch trace call iterators.
310	Return a negative number if LHS < RHS.
311	Return zero if LHS == RHS.
312	Return a positive number if LHS > RHS. */
313	extern int btrace_call_cmp (const struct btrace_call_iterator *lhs,
314	const struct btrace_call_iterator *rhs);
315
316	/* Find a function in the function branch trace by its NUMBER.
317	If the function is found, initialize the branch trace call
318	iterator to point to this function and return non-zero.
319	Return zero otherwise. */
320	extern int btrace_find_call_by_number (struct btrace_call_iterator *,
321	const struct btrace_thread_info *,
322	unsigned int number);
323
324	/* Set the branch trace instruction history from BEGIN (inclusive) to
325	END (exclusive). */
326	extern void btrace_set_insn_history (struct btrace_thread_info *,
327	const struct btrace_insn_iterator *begin,
328	const struct btrace_insn_iterator *end);
329
330	/* Set the branch trace function call history from BEGIN (inclusive) to
331	END (exclusive). */
332	extern void btrace_set_call_history (struct btrace_thread_info *,
333	const struct btrace_call_iterator *begin,
334	const struct btrace_call_iterator *end);
335
07bbe694 MM	336	/* Determine if branch tracing is currently replaying TP. */
	337	extern int btrace_is_replaying (struct thread_info *tp);
	338
6e07b1d2 MM	339	/* Return non-zero if the branch trace for TP is empty; zero otherwise. */
	340	extern int btrace_is_empty (struct thread_info *tp);
	341
	342
02d27625	343	#endif /* BTRACE_H */