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/* Debug counter for debugging support
Copyright (C) 2006-2018 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 "dumpfile.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_high[debug_counter_number_of_counters] =
{
#include "dbgcnt.def"
};
#undef DEBUG_COUNTER
static unsigned int limit_low[debug_counter_number_of_counters];
static unsigned int count[debug_counter_number_of_counters];
bool
dbg_cnt_is_enabled (enum debug_counter index)
{
unsigned v = count[index];
return v > limit_low[index] && v <= limit_high[index];
}
bool
dbg_cnt (enum debug_counter index)
{
count[index]++;
if (dump_file)
{
/* Do not print the info for default lower limit. */
if (count[index] == limit_low[index] && limit_low[index] > 0)
fprintf (dump_file, "***dbgcnt: lower limit %d reached for %s.***\n",
limit_low[index], map[index].name);
else if (count[index] == limit_high[index])
fprintf (dump_file, "***dbgcnt: upper limit %d reached for %s.***\n",
limit_high[index], map[index].name);
}
return dbg_cnt_is_enabled (index);
}
static void
dbg_cnt_set_limit_by_index (enum debug_counter index, int low, int high)
{
limit_low[index] = low;
limit_high[index] = high;
fprintf (stderr, "dbg_cnt '%s' set to %d-%d\n", map[index].name, low, high);
}
static bool
dbg_cnt_set_limit_by_name (const char *name, int low, int high)
{
if (high < low)
{
error ("-fdbg-cnt=%s:%d:%d has smaller upper limit than the lower",
name, low, high);
return false;
}
if (low < 0)
{
error ("Lower limit %d of -fdbg-cnt=%s must be a non-negative number", low,
name);
return false;
}
if (high < 0)
{
error ("Upper limit %d of -fdbg-cnt=%s must be a non-negative number", high,
name);
return false;
}
int i;
for (i = debug_counter_number_of_counters - 1; i >= 0; i--)
if (strcmp (map[i].name, name) == 0)
break;
if (i < 0)
return false;
dbg_cnt_set_limit_by_index ((enum debug_counter) i, low, high);
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 bool
dbg_cnt_process_single_pair (const char *arg)
{
char *str = xstrdup (arg);
char *name = strtok (str, ":");
char *value1 = strtok (NULL, ":");
char *value2 = strtok (NULL, ":");
int high, low;
if (value1 == NULL)
return false;
if (value2 == NULL)
{
low = 0;
high = strtol (value1, NULL, 10);
}
else
{
low = strtol (value1, NULL, 10);
high = strtol (value2, NULL, 10);
}
return dbg_cnt_set_limit_by_name (name, low, high);
}
void
dbg_cnt_process_opt (const char *arg)
{
char *str = xstrdup (arg);
const char *next = strtok (str, ",");
unsigned int start = 0;
do {
if (!dbg_cnt_process_single_pair (arg))
break;
start += strlen (arg) + 1;
next = strtok (NULL, ",");
} while (next != NULL);
if (next != NULL)
{
char *buffer = XALLOCAVEC (char, start + 2);
sprintf (buffer, "%*c", start + 1, '^');
error ("cannot find a valid counter:value pair:");
error ("-fdbg-cnt=%s", next);
error (" %s", buffer);
}
}
/* Print name, limit and count of all counters. */
void
dbg_cnt_list_all_counters (void)
{
int i;
printf (" %-32s %-11s %-12s\n", "counter name", "low limit",
"high limit");
printf ("-----------------------------------------------------------------\n");
for (i = 0; i < debug_counter_number_of_counters; i++)
printf (" %-30s %11u %12u\n",
map[i].name, limit_low[map[i].counter], limit_high[map[i].counter]);
printf ("\n");
}
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