binutils-gdb/gdb/tracepoint.h

/* Data structures associated with tracepoints in GDB.
   Copyright (C) 1997, 1998, 1999, 2000, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.

   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/>.  */

#if !defined (TRACEPOINT_H)
#define TRACEPOINT_H 1

/* The data structure for an action: */
struct action_line
  {
    struct action_line *next;
    char *action;
  };

enum actionline_type
  {
    BADLINE = -1,
    GENERIC = 0,
    END = 1,
    STEPPING = 2
  };

/* A trace state variable is a value managed by a target being
   traced. A trace state variable (or tsv for short) can be accessed
   and assigned to by tracepoint actions and conditionals, but is not
   part of the program being traced, and it doesn't have to be
   collected. Effectively the variables are scratch space for
   tracepoints.  */

struct trace_state_variable
  {
    /* The variable's name.  The user has to prefix with a dollar sign,
       but we don't store that internally.  */
    const char *name;

    /* An id number assigned by GDB, and transmitted to targets.  */
    int number;

    /* The initial value of a variable is a 64-bit signed integer.  */
    LONGEST initial_value;

    /* 1 if the value is known, else 0.  The value is known during a
       trace run, or in tfind mode if the variable was collected into
       the current trace frame.  */
    int value_known;

    /* The value of a variable is a 64-bit signed integer.  */
    LONGEST value;

    /* This is true for variables that are predefined and built into
       the target.  */
    int builtin;
   };

/* The trace status encompasses various info about the general state
   of the tracing run.  */

enum trace_stop_reason
  {
    trace_stop_reason_unknown,
    trace_never_run,
    tstop_command,
    trace_buffer_full,
    trace_disconnected,
    tracepoint_passcount
  };

struct trace_status
{
  /* This is true if the status is coming from a file rather
     than a live target.  */
  int from_file;

  /* This is true if the value of the running field is known.  */
  int running_known;

  int running;

  enum trace_stop_reason stop_reason;

  int stopping_tracepoint;

  int traceframe_count;

  unsigned long long buffer_size;

  unsigned long long buffer_free;
};

struct trace_status *current_trace_status (void);

extern char *default_collect;

/* Struct to collect random info about tracepoints on the target.  */

struct uploaded_tp {
  int number;
  enum bptype type;
  ULONGEST addr;
  int enabled;
  int step;
  int pass;
  int orig_size;
  char *cond;
  int numactions;
  char *actions[100];
  int num_step_actions;
  char *step_actions[100];
  struct uploaded_tp *next;
};

/* Struct recording info about trace state variables on the target.  */

struct uploaded_tsv {
  const char *name;
  int number;
  LONGEST initial_value;
  int builtin;
  struct uploaded_tsv *next;
};

/* A hook used to notify the UI of tracepoint operations.  */

extern void (*deprecated_trace_find_hook) (char *arg, int from_tty);
extern void (*deprecated_trace_start_stop_hook) (int start, int from_tty);

int get_traceframe_number (void);
void set_traceframe_number (int);
struct cleanup *make_cleanup_restore_current_traceframe (void);

void free_actions (struct breakpoint *);
enum actionline_type validate_actionline (char **, struct breakpoint *);

extern void end_actions_pseudocommand (char *args, int from_tty);
extern void while_stepping_pseudocommand (char *args, int from_tty);

extern struct trace_state_variable *find_trace_state_variable (const char *name);

extern void parse_trace_status (char *line, struct trace_status *ts);

extern void parse_tracepoint_definition (char *line, struct uploaded_tp **utpp);
extern void parse_tsv_definition (char *line, struct uploaded_tsv **utsvp);

extern struct uploaded_tp *get_uploaded_tp (int num, ULONGEST addr,
					    struct uploaded_tp **utpp);
extern struct breakpoint *create_tracepoint_from_upload (struct uploaded_tp *utp);
extern void merge_uploaded_tracepoints (struct uploaded_tp **utpp);
extern void merge_uploaded_trace_state_variables (struct uploaded_tsv **utsvp);

#endif	/* TRACEPOINT_H */