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/* Debug counter for debugging support

   Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

This file is part of GCC.

GCC 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, or (at your option) any later

version.

GCC 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 GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.

See dbgcnt.def for usage information.  */

#include "config.h"

#include "system.h"

#include "coretypes.h"

#include "diagnostic-core.h"

#include "tm.h"

#include "rtl.h"

#include "output.h"

#include "dbgcnt.h"

struct string2counter_map {

  const char *name;

  enum debug_counter counter;

};

#define DEBUG_COUNTER(a) { #a , a },

static struct string2counter_map map[debug_counter_number_of_counters] =

{

#include "dbgcnt.def"

};

#undef DEBUG_COUNTER

#define DEBUG_COUNTER(a) UINT_MAX,

static unsigned int limit[debug_counter_number_of_counters] =

{

#include "dbgcnt.def"

};

#undef DEBUG_COUNTER

static unsigned int count[debug_counter_number_of_counters];

bool

dbg_cnt_is_enabled (enum debug_counter index)

{

  return count[index] <= limit[index];

}

bool

dbg_cnt (enum debug_counter index)

{

  count[index]++;

  if (dump_file && count[index] == limit[index])

    fprintf (dump_file, "***dbgcnt: limit reached for %s.***\n",

             map[index].name);

  return dbg_cnt_is_enabled (index);

}

static void

dbg_cnt_set_limit_by_index (enum debug_counter index, int value)

{

  limit[index] = value;

  fprintf (stderr, "dbg_cnt '%s' set to %d\n", map[index].name, value);

}

static bool

dbg_cnt_set_limit_by_name (const char *name, int len, int value)

{

  int i;

  for (i = debug_counter_number_of_counters - 1; i >= 0; i--)

    if (strncmp (map[i].name, name, len) == 0

        && map[i].name[len] == '\0')

      break;

  if (i < 0)

    return false;

  dbg_cnt_set_limit_by_index ((enum debug_counter) i, value);

  return true;

}

/* Process a single "name:value" pair.

   Returns NULL if there's no valid pair is found.

   Otherwise returns a pointer to the end of the pair. */

static const char *

dbg_cnt_process_single_pair (const char *arg)

{

   const char *colon = strchr (arg, ':');

   char *endptr = NULL;

   int value;

   if (colon == NULL)

     return NULL;

   value = strtol (colon + 1, &endptr, 10);

   if (endptr != NULL && endptr != colon + 1

       && dbg_cnt_set_limit_by_name (arg, colon - arg, value))

     return endptr;

   return NULL;

}

void

dbg_cnt_process_opt (const char *arg)

{

   const char *start = arg;

   const char *next;

   do {

     next = dbg_cnt_process_single_pair (arg);

     if (next == NULL)

       break;

   } while (*next == ',' && (arg = next + 1));

   if (next == NULL || *next != 0)

     {

       char *buffer = XALLOCAVEC (char, arg - start + 2);

       sprintf (buffer, "%*c", (int)(1 + (arg - start)), '^');

       error ("cannot find a valid counter:value pair:");

       error ("-fdbg-cnt=%s", start);

       error ("          %s", buffer);

     }

}

/* Print name, limit and count of all counters.   */

void

dbg_cnt_list_all_counters (void)

{

  int i;

  printf ("  %-30s %-5s %-5s\n", "counter name",  "limit", "value");

  printf ("----------------------------------------------\n");

  for (i = 0; i < debug_counter_number_of_counters; i++)

    printf ("  %-30s %5d %5u\n",

            map[i].name, limit[map[i].counter], count[map[i].counter]);

  printf ("\n");

}