1/* Debug counter for debugging support
2 Copyright (C) 2006-2017 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3. If not see
18<http://www.gnu.org/licenses/>.
19
20See dbgcnt.def for usage information. */
21
22#include "config.h"
23#include "system.h"
24#include "coretypes.h"
25#include "diagnostic-core.h"
26#include "dumpfile.h"
27
28#include "dbgcnt.h"
29
30struct string2counter_map {
31 const char *name;
32 enum debug_counter counter;
33};
34
35#define DEBUG_COUNTER(a) { #a , a },
36
37static struct string2counter_map map[debug_counter_number_of_counters] =
38{
39#include "dbgcnt.def"
40};
41#undef DEBUG_COUNTER
42
43#define DEBUG_COUNTER(a) UINT_MAX,
44static unsigned int limit[debug_counter_number_of_counters] =
45{
46#include "dbgcnt.def"
47};
48#undef DEBUG_COUNTER
49
50static unsigned int count[debug_counter_number_of_counters];
51
52bool
53dbg_cnt_is_enabled (enum debug_counter index)
54{
55 return count[index] <= limit[index];
56}
57
58bool
59dbg_cnt (enum debug_counter index)
60{
61 count[index]++;
62 if (dump_file && count[index] == limit[index])
63 fprintf (dump_file, "***dbgcnt: limit reached for %s.***\n",
64 map[index].name);
65
66 return dbg_cnt_is_enabled (index);
67}
68
69
70static void
71dbg_cnt_set_limit_by_index (enum debug_counter index, int value)
72{
73 limit[index] = value;
74
75 fprintf (stderr, "dbg_cnt '%s' set to %d\n", map[index].name, value);
76}
77
78static bool
79dbg_cnt_set_limit_by_name (const char *name, int len, int value)
80{
81 int i;
82 for (i = debug_counter_number_of_counters - 1; i >= 0; i--)
83 if (strncmp (map[i].name, name, len) == 0
84 && map[i].name[len] == '\0')
85 break;
86
87 if (i < 0)
88 return false;
89
90 dbg_cnt_set_limit_by_index ((enum debug_counter) i, value);
91 return true;
92}
93
94
95/* Process a single "name:value" pair.
96 Returns NULL if there's no valid pair is found.
97 Otherwise returns a pointer to the end of the pair. */
98
99static const char *
100dbg_cnt_process_single_pair (const char *arg)
101{
102 const char *colon = strchr (arg, ':');
103 char *endptr = NULL;
104 int value;
105
106 if (colon == NULL)
107 return NULL;
108
109 value = strtol (colon + 1, &endptr, 10);
110
111 if (endptr != NULL && endptr != colon + 1
112 && dbg_cnt_set_limit_by_name (arg, colon - arg, value))
113 return endptr;
114
115 return NULL;
116}
117
118void
119dbg_cnt_process_opt (const char *arg)
120{
121 const char *start = arg;
122 const char *next;
123 do {
124 next = dbg_cnt_process_single_pair (arg);
125 if (next == NULL)
126 break;
127 } while (*next == ',' && (arg = next + 1));
128
129 if (next == NULL || *next != 0)
130 {
131 char *buffer = XALLOCAVEC (char, arg - start + 2);
132 sprintf (buffer, "%*c", (int)(1 + (arg - start)), '^');
133 error ("cannot find a valid counter:value pair:");
134 error ("-fdbg-cnt=%s", start);
135 error (" %s", buffer);
136 }
137}
138
139/* Print name, limit and count of all counters. */
140
141void
142dbg_cnt_list_all_counters (void)
143{
144 int i;
145 printf (" %-30s %-5s %-5s\n", "counter name", "limit", "value");
146 printf ("----------------------------------------------\n");
147 for (i = 0; i < debug_counter_number_of_counters; i++)
148 printf (" %-30s %5d %5u\n",
149 map[i].name, limit[map[i].counter], count[map[i].counter]);
150 printf ("\n");
151}
152