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 match_sval_info(const char *fn, struct expression *expr, void *info)
 130 {
 131         struct expression *arg;
 132         sval_t sval;
 133         char *name;
 134
 135         arg = get_argument_from_call_expr(expr->args, 0);
 136         name = get_variable_from_expr_complex(arg, NULL);
 137
 138         if (!get_implied_value_sval(arg, &sval)) {
 139                 sm_msg("no sval for '%s'", name);
 140                 goto free;
 141         }
 142
 143         sm_msg("implied: %s %c%d ->value = %llx", name, sval_unsigned(sval) ? 'u' : 's', sval_bits(sval), sval.value);
 144 free:
 145         free_string(name);
 146 }
 147
 148 static void print_possible(struct sm_state *sm)
 149 {
 150         struct sm_state *tmp;
 151
 152         sm_msg("Possible values for %s", sm->name);
 153         FOR_EACH_PTR(sm->possible, tmp) {
 154                 printf("%s\n", tmp->state->name);
 155         } END_FOR_EACH_PTR(tmp);
 156         sm_msg("===");
 157 }
 158
 159 static void match_possible(const char *fn, struct expression *expr, void *info)
 160 {
 161         struct state_list *slist;
 162         struct sm_state *tmp;
 163         struct expression *arg_expr;
 164
 165         arg_expr = get_argument_from_call_expr(expr->args, 0);
 166         if (arg_expr->type != EXPR_STRING) {
 167                 sm_msg("error:  the argument to %s is supposed to be a string literal", fn);
 168                 return;
 169         }
 170
 171         slist = get_all_states(SMATCH_EXTRA);
 172         FOR_EACH_PTR(slist, tmp) {
 173                 if (!strcmp(tmp->name, arg_expr->string->data))
 174                         print_possible(tmp);
 175         } END_FOR_EACH_PTR(tmp);
 176         free_slist(&slist);
 177 }
 178
 179 static void match_buf_size(const char *fn, struct expression *expr, void *info)
 180 {
 181         struct expression *arg;
 182         int elements, bytes;
 183         char *name;
 184
 185         arg = get_argument_from_call_expr(expr->args, 0);
 186         elements = get_array_size(arg);
 187         bytes = get_array_size_bytes(arg);
 188
 189         name = get_variable_from_expr_complex(arg, NULL);
 190         sm_msg("buf size: '%s' %d elements, %d bytes", name, elements, bytes);
 191         free_string(name);
 192 }
 193
 194 static void match_note(const char *fn, struct expression *expr, void *info)
 195 {
 196         struct expression *arg_expr;
 197
 198         arg_expr = get_argument_from_call_expr(expr->args, 0);
 199         if (arg_expr->type != EXPR_STRING) {
 200                 sm_msg("error:  the argument to %s is supposed to be a string literal", fn);
 201                 return;
 202         }
 203         sm_msg("%s", arg_expr->string->data);
 204 }
 205
 206 static void print_related(struct sm_state *sm)
 207 {
 208         struct relation *rel;
 209
 210         if (!estate_related(sm->state))
 211                 return;
 212
 213         sm_prefix();
 214         sm_printf("%s: ", sm->name);
 215         FOR_EACH_PTR(estate_related(sm->state), rel) {
 216                 sm_printf("%s %s ", show_special(rel->op), rel->name);
 217         } END_FOR_EACH_PTR(rel);
 218         sm_printf("\n");
 219 }
 220
 221 static void match_dump_related(const char *fn, struct expression *expr, void *info)
 222 {
 223         struct state_list *slist;
 224         struct sm_state *tmp;
 225
 226         slist = get_all_states(SMATCH_EXTRA);
 227         FOR_EACH_PTR(slist, tmp) {
 228                 print_related(tmp);
 229         } END_FOR_EACH_PTR(tmp);
 230         free_slist(&slist);
 231 }
 232
 233 static void match_debug_on(const char *fn, struct expression *expr, void *info)
 234 {
 235         option_debug = 1;
 236 }
 237
 238 static void match_debug_off(const char *fn, struct expression *expr, void *info)
 239 {
 240         option_debug = 0;
 241 }
 242
 243 void check_debug(int id)
 244 {
 245         my_id = id;
 246         add_function_hook("__smatch_all_values", &match_all_values, NULL);
 247         add_function_hook("__smatch_value", &match_print_value, NULL);
 248         add_function_hook("__smatch_implied", &match_print_implied, NULL);
 249         add_function_hook("__smatch_implied_min", &match_print_implied_min, NULL);
 250         add_function_hook("__smatch_implied_max", &match_print_implied_max, NULL);
 251         add_function_hook("__smatch_absolute_min", &match_print_absolute_min, NULL);
 252         add_function_hook("__smatch_absolute_max", &match_print_absolute_max, NULL);
 253         add_function_hook("__smatch_sval_info", &match_sval_info, NULL);
 254         add_function_hook("__smatch_possible", &match_possible, NULL);
 255         add_function_hook("__smatch_cur_slist", &match_cur_slist, NULL);
 256         add_function_hook("__smatch_buf_size", &match_buf_size, NULL);
 257         add_function_hook("__smatch_note", &match_note, NULL);
 258         add_function_hook("__smatch_dump_related", &match_dump_related, NULL);
 259         add_function_hook("__smatch_debug_on", &match_debug_on, NULL);
 260         add_function_hook("__smatch_debug_off", &match_debug_off, NULL);
 261 }