/* Data structures associated with tracepoints in GDB.
   Copyright (C) 1997 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#if !defined (TRACEPOINT_H)
#define TRACEPOINT_H 1

#if !defined (BREAKPOINT_H)
enum enable { disabled, enabled };
#endif
/* The data structure for an action: */
struct action_line 
{
  struct action_line *next;
  char *action;
};

/* The data structure for a tracepoint: */

struct tracepoint
{
  struct tracepoint *next;

  enum enable enabled;

#if 0
  /* Type of tracepoint (MVS FIXME: needed?). */
  enum tptype type;

  /* What to do with this tracepoint after we hit it MVS FIXME: needed?). */
  enum tpdisp disposition;
#endif
  /* Number assigned to distinguish tracepoints.  */
  int number;

  /* Address to trace at, or NULL if not an instruction tracepoint (MVS ?). */
  CORE_ADDR address;

  /* Line number of this address.  Only matters if address is non-NULL.  */
  int line_number;

  /* Source file name of this address.  Only matters if address is non-NULL. */
  char *source_file;

  /* Number of times this tracepoint should single-step 
     and collect additional data */
  long step_count;

  /* Number of times this tracepoint should be hit before disabling/ending. */
  int pass_count;
  
  /* Chain of action lines to execute when this tracepoint is hit. */
  struct action_line *actions;

  /* Conditional (MVS ?).  */
  struct expression *cond;

  /* String we used to set the tracepoint (malloc'd).  Only matters if
     address is non-NULL.  */
  char *addr_string;

  /* Language we used to set the tracepoint.  */
  enum language language;

  /* Input radix we used to set the tracepoint.  */
  int input_radix;

  /* Count of the number of times this tracepoint was taken, dumped
     with the info, but not used for anything else.  Useful for
     seeing how many times you hit a tracepoint prior to the program
     aborting, so you can back up to just before the abort.  */
  int hit_count;

  /* Thread number for thread-specific tracepoint, or -1 if don't care */ 
  int thread;

  /* BFD section, in case of overlays: 
     no, I don't know if tracepoints are really gonna work with overlays.  */
  asection *section;
};

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


/* The tracepont chain of all tracepoints */

extern struct tracepoint *tracepoint_chain;

extern unsigned long trace_running_p;

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

void (*create_tracepoint_hook) PARAMS ((struct tracepoint *));
void (*delete_tracepoint_hook) PARAMS ((struct tracepoint *));
void (*modify_tracepoint_hook) PARAMS ((struct tracepoint *));
void (*trace_find_hook) PARAMS ((char *arg, int from_tty));
void (*trace_start_stop_hook) PARAMS ((int start, int from_tty));

struct tracepoint *get_tracepoint_by_number PARAMS ((char **));
int get_traceframe_number PARAMS ((void));
void  free_actions PARAMS((struct tracepoint *));
enum actionline_type validate_actionline PARAMS((char **,
                                                        struct tracepoint *));


/* Walk the following statement or block through all tracepoints.
   ALL_TRACEPOINTS_SAFE does so even if the statment deletes the current
   breakpoint.  */

#define ALL_TRACEPOINTS(t)  for (t = tracepoint_chain; t; t = t->next)

#define ALL_TRACEPOINTS_SAFE(t,tmp)	\
	for (t = tracepoint_chain;	\
	     t ? (tmp = t->next, 1) : 0;\
	     t = tmp)
#endif /* TRACEPOINT_H */