1 /* Debug counter for debugging support 2 Copyright (C) 2006, 2007, 2008, 2009, 2010 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 "tm.h" 27 #include "rtl.h" 28 #include "output.h" 29 30 #include "dbgcnt.h" 31 32 struct string2counter_map { 33 const char *name; 34 enum debug_counter counter; 35 }; 36 37 #define DEBUG_COUNTER(a) { #a , a }, 38 39 static struct string2counter_map map[debug_counter_number_of_counters] = 40 { 41 #include "dbgcnt.def" 42 }; 43 #undef DEBUG_COUNTER 44 45 #define DEBUG_COUNTER(a) UINT_MAX, 46 static unsigned int limit[debug_counter_number_of_counters] = 47 { 48 #include "dbgcnt.def" 49 }; 50 #undef DEBUG_COUNTER 51 52 static unsigned int count[debug_counter_number_of_counters]; 53 54 bool 55 dbg_cnt_is_enabled (enum debug_counter index) 56 { 57 return count[index] <= limit[index]; 58 } 59 60 bool 61 dbg_cnt (enum debug_counter index) 62 { 63 count[index]++; 64 if (dump_file && count[index] == limit[index]) 65 fprintf (dump_file, "***dbgcnt: limit reached for %s.***\n", 66 map[index].name); 67 68 return dbg_cnt_is_enabled (index); 69 } 70 71 72 static void 73 dbg_cnt_set_limit_by_index (enum debug_counter index, int value) 74 { 75 limit[index] = value; 76 77 fprintf (stderr, "dbg_cnt '%s' set to %d\n", map[index].name, value); 78 } 79 80 static bool 81 dbg_cnt_set_limit_by_name (const char *name, int len, int value) 82 { 83 int i; 84 for (i = debug_counter_number_of_counters - 1; i >= 0; i--) 85 if (strncmp (map[i].name, name, len) == 0 86 && map[i].name[len] == '\0') 87 break; 88 89 if (i < 0) 90 return false; 91 92 dbg_cnt_set_limit_by_index ((enum debug_counter) i, value); 93 return true; 94 } 95 96 97 /* Process a single "name:value" pair. 98 Returns NULL if there's no valid pair is found. 99 Otherwise returns a pointer to the end of the pair. */ 100 101 static const char * 102 dbg_cnt_process_single_pair (const char *arg) 103 { 104 const char *colon = strchr (arg, ':'); 105 char *endptr = NULL; 106 int value; 107 108 if (colon == NULL) 109 return NULL; 110 111 value = strtol (colon + 1, &endptr, 10); 112 113 if (endptr != NULL && endptr != colon + 1 114 && dbg_cnt_set_limit_by_name (arg, colon - arg, value)) 115 return endptr; 116 117 return NULL; 118 } 119 120 void 121 dbg_cnt_process_opt (const char *arg) 122 { 123 const char *start = arg; 124 const char *next; 125 do { 126 next = dbg_cnt_process_single_pair (arg); 127 if (next == NULL) 128 break; 129 } while (*next == ',' && (arg = next + 1)); 130 131 if (next == NULL || *next != 0) 132 { 133 char *buffer = XALLOCAVEC (char, arg - start + 2); 134 sprintf (buffer, "%*c", (int)(1 + (arg - start)), '^'); 135 error ("cannot find a valid counter:value pair:"); 136 error ("-fdbg-cnt=%s", start); 137 error (" %s", buffer); 138 } 139 } 140 141 /* Print name, limit and count of all counters. */ 142 143 void 144 dbg_cnt_list_all_counters (void) 145 { 146 int i; 147 printf (" %-30s %-5s %-5s\n", "counter name", "limit", "value"); 148 printf ("----------------------------------------------\n"); 149 for (i = 0; i < debug_counter_number_of_counters; i++) 150 printf (" %-30s %5d %5u\n", 151 map[i].name, limit[map[i].counter], count[map[i].counter]); 152 printf ("\n"); 153 } 154