1 /* Debug counter for debugging support 2 Copyright (C) 2006-2018 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. 19 20 See 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 30 struct string2counter_map { 31 const char *name; 32 enum debug_counter counter; 33 }; 34 35 #define DEBUG_COUNTER(a) { #a , a }, 36 37 static 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, 44 static unsigned int limit[debug_counter_number_of_counters] = 45 { 46 #include "dbgcnt.def" 47 }; 48 #undef DEBUG_COUNTER 49 50 static unsigned int count[debug_counter_number_of_counters]; 51 52 bool 53 dbg_cnt_is_enabled (enum debug_counter index) 54 { 55 return count[index] <= limit[index]; 56 } 57 58 bool 59 dbg_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 70 static void 71 dbg_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 78 static bool 79 dbg_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 99 static const char * 100 dbg_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 } 117 118 void 119 dbg_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. */ 140 141 void 142 dbg_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