check_debug.c

   1 /*
   2  * sparse/check_debug.c
   3  *
   4  * Copyright (C) 2009 Dan Carpenter.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #include "smatch.h"
  11 #include "smatch_slist.h"
  12 #include "smatch_extra.h"
  13
  14 static int my_id;
  15
  16 static void match_all_values(const char *fn, struct expression *expr, void *info)
  17 {
  18         struct state_list *slist;
  19
  20         slist = get_all_states(SMATCH_EXTRA);
  21         __print_slist(slist);
  22         free_slist(&slist);
  23 }
  24
  25 static void match_cur_slist(const char *fn, struct expression *expr, void *info)
  26 {
  27         __print_cur_slist();
  28 }
  29
  30 static void match_print_value(const char *fn, struct expression *expr, void *info)
  31 {
  32         struct state_list *slist;
  33         struct sm_state *tmp;
  34         struct expression *arg_expr;
  35
  36         arg_expr = get_argument_from_call_expr(expr->args, 0);
  37         if (arg_expr->type != EXPR_STRING) {
  38                 sm_msg("error:  the argument to %s is supposed to be a string literal", fn);
  39                 return;
  40         }
  41
  42         slist = get_all_states(SMATCH_EXTRA);
  43         FOR_EACH_PTR(slist, tmp) {
  44                 if (!strcmp(tmp->name, arg_expr->string->data))
  45                         sm_msg("%s = %s", tmp->name, tmp->state->name);
  46         } END_FOR_EACH_PTR(tmp);
  47         free_slist(&slist);
  48 }
  49
  50 static void match_print_implied(const char *fn, struct expression *expr, void *info)
  51 {
  52         struct expression *arg;
  53         struct range_list_sval *rl = NULL;
  54         char *name;
  55
  56         arg = get_argument_from_call_expr(expr->args, 0);
  57         get_implied_range_list_sval(arg, &rl);
  58
  59         name = get_variable_from_expr_complex(arg, NULL);
  60         sm_msg("implied: %s = '%s'", name, show_ranges_sval(rl));
  61         free_string(name);
  62 }
  63
  64 static void match_print_implied_min(const char *fn, struct expression *expr, void *info)
  65 {
  66         struct expression *arg;
  67         sval_t sval;
  68         char *name;
  69
  70         arg = get_argument_from_call_expr(expr->args, 0);
  71         name = get_variable_from_expr_complex(arg, NULL);
  72
  73         if (get_implied_min_sval(arg, &sval))
  74                 sm_msg("implied min: %s = %s", name, sval_to_str(sval));
  75         else
  76                 sm_msg("implied min: %s = <unknown>", name);
  77
  78         free_string(name);
  79 }
  80
  81 static void match_print_implied_max(const char *fn, struct expression *expr, void *info)
  82 {
  83         struct expression *arg;
  84         sval_t sval;
  85         char *name;
  86
  87         arg = get_argument_from_call_expr(expr->args, 0);
  88         name = get_variable_from_expr_complex(arg, NULL);
  89
  90         if (!get_implied_max_sval(arg, &sval))
  91                 sm_msg("implied max: %s = %s", name, sval_to_str(sval));
  92         else
  93                 sm_msg("implied max: %s = <unknown>", name);
  94
  95         free_string(name);
  96 }
  97
  98 static void match_print_absolute_min(const char *fn, struct expression *expr, void *info)
  99 {
 100         struct expression *arg;
 101         sval_t sval;
 102         char *name;
 103
 104         arg = get_argument_from_call_expr(expr->args, 0);
 105         name = get_variable_from_expr_complex(arg, NULL);
 106
 107         if (get_absolute_min_sval(arg, &sval))
 108                 sm_msg("absolute min: %s = %s", name, sval_to_str(sval));
 109         else
 110                 sm_msg("absolute min: %s = <unknown>", name);
 111
 112         free_string(name);
 113 }
 114
 115 static void match_print_absolute_max(const char *fn, struct expression *expr, void *info)
 116 {
 117         struct expression *arg;
 118         sval_t sval;
 119         char *name;
 120
 121         arg = get_argument_from_call_expr(expr->args, 0);
 122         get_absolute_max_sval(arg, &sval);
 123
 124         name = get_variable_from_expr_complex(arg, NULL);
 125         sm_msg("absolute max: %s = %s", name, sval_to_str(sval));
 126         free_string(name);
 127 }
 128
 129 static void print_possible(struct sm_state *sm)
 130 {
 131         struct sm_state *tmp;
 132
 133         sm_msg("Possible values for %s", sm->name);
 134         FOR_EACH_PTR(sm->possible, tmp) {
 135                 printf("%s\n", tmp->state->name);
 136         } END_FOR_EACH_PTR(tmp);
 137         sm_msg("===");
 138 }
 139
 140 static void match_possible(const char *fn, struct expression *expr, void *info)
 141 {
 142         struct state_list *slist;
 143         struct sm_state *tmp;
 144         struct expression *arg_expr;
 145
 146         arg_expr = get_argument_from_call_expr(expr->args, 0);
 147         if (arg_expr->type != EXPR_STRING) {
 148                 sm_msg("error:  the argument to %s is supposed to be a string literal", fn);
 149                 return;
 150         }
 151
 152         slist = get_all_states(SMATCH_EXTRA);
 153         FOR_EACH_PTR(slist, tmp) {
 154                 if (!strcmp(tmp->name, arg_expr->string->data))
 155                         print_possible(tmp);
 156         } END_FOR_EACH_PTR(tmp);
 157         free_slist(&slist);
 158 }
 159
 160 static void match_buf_size(const char *fn, struct expression *expr, void *info)
 161 {
 162         struct expression *arg;
 163         int elements, bytes;
 164         char *name;
 165
 166         arg = get_argument_from_call_expr(expr->args, 0);
 167         elements = get_array_size(arg);
 168         bytes = get_array_size_bytes(arg);
 169
 170         name = get_variable_from_expr_complex(arg, NULL);
 171         sm_msg("buf size: '%s' %d elements, %d bytes", name, elements, bytes);
 172         free_string(name);
 173 }
 174
 175 static void match_note(const char *fn, struct expression *expr, void *info)
 176 {
 177         struct expression *arg_expr;
 178
 179         arg_expr = get_argument_from_call_expr(expr->args, 0);
 180         if (arg_expr->type != EXPR_STRING) {
 181                 sm_msg("error:  the argument to %s is supposed to be a string literal", fn);
 182                 return;
 183         }
 184         sm_msg("%s", arg_expr->string->data);
 185 }
 186
 187 static void print_related(struct sm_state *sm)
 188 {
 189         struct relation *rel;
 190
 191         if (!estate_related(sm->state))
 192                 return;
 193
 194         sm_prefix();
 195         sm_printf("%s: ", sm->name);
 196         FOR_EACH_PTR(estate_related(sm->state), rel) {
 197                 sm_printf("%s %s ", show_special(rel->op), rel->name);
 198         } END_FOR_EACH_PTR(rel);
 199         sm_printf("\n");
 200 }
 201
 202 static void match_dump_related(const char *fn, struct expression *expr, void *info)
 203 {
 204         struct state_list *slist;
 205         struct sm_state *tmp;
 206
 207         slist = get_all_states(SMATCH_EXTRA);
 208         FOR_EACH_PTR(slist, tmp) {
 209                 print_related(tmp);
 210         } END_FOR_EACH_PTR(tmp);
 211         free_slist(&slist);
 212 }
 213
 214 static void match_debug_on(const char *fn, struct expression *expr, void *info)
 215 {
 216         option_debug = 1;
 217 }
 218
 219 static void match_debug_off(const char *fn, struct expression *expr, void *info)
 220 {
 221         option_debug = 0;
 222 }
 223
 224 void check_debug(int id)
 225 {
 226         my_id = id;
 227         add_function_hook("__smatch_all_values", &match_all_values, NULL);
 228         add_function_hook("__smatch_value", &match_print_value, NULL);
 229         add_function_hook("__smatch_implied", &match_print_implied, NULL);
 230         add_function_hook("__smatch_implied_min", &match_print_implied_min, NULL);
 231         add_function_hook("__smatch_implied_max", &match_print_implied_max, NULL);
 232         add_function_hook("__smatch_absolute_min", &match_print_absolute_min, NULL);
 233         add_function_hook("__smatch_absolute_max", &match_print_absolute_max, NULL);
 234         add_function_hook("__smatch_possible", &match_possible, NULL);
 235         add_function_hook("__smatch_cur_slist", &match_cur_slist, NULL);
 236         add_function_hook("__smatch_buf_size", &match_buf_size, NULL);
 237         add_function_hook("__smatch_note", &match_note, NULL);
 238         add_function_hook("__smatch_dump_related", &match_dump_related, NULL);
 239         add_function_hook("__smatch_debug_on", &match_debug_on, NULL);
 240         add_function_hook("__smatch_debug_off", &match_debug_off, NULL);
 241 }