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 *rl = NULL;
  54         char *name;
  55
  56         arg = get_argument_from_call_expr(expr->args, 0);
  57         get_implied_range_list(arg, &rl);
  58
  59         name = get_variable_from_expr_complex(arg, NULL);
  60         sm_msg("implied: %s = '%s'", name, show_ranges(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         long long val;
  68         char *name;
  69
  70         arg = get_argument_from_call_expr(expr->args, 0);
  71         if (!get_implied_min(arg, &val))
  72                 val = whole_range.min;
  73
  74         name = get_variable_from_expr_complex(arg, NULL);
  75         sm_msg("implied min: %s = %lld", name, val);
  76         free_string(name);
  77 }
  78
  79 static void match_print_implied_max(const char *fn, struct expression *expr, void *info)
  80 {
  81         struct expression *arg;
  82         long long val;
  83         char *name;
  84
  85         arg = get_argument_from_call_expr(expr->args, 0);
  86         if (!get_implied_max(arg, &val))
  87                 val = whole_range.max;
  88
  89         name = get_variable_from_expr_complex(arg, NULL);
  90         sm_msg("implied max: %s = %lld", name, val);
  91         free_string(name);
  92 }
  93
  94 static void match_print_absolute_min(const char *fn, struct expression *expr, void *info)
  95 {
  96         struct expression *arg;
  97         long long val;
  98         char *name;
  99
 100         arg = get_argument_from_call_expr(expr->args, 0);
 101         if (!get_absolute_min(arg, &val))
 102                 val = whole_range.min;
 103
 104         name = get_variable_from_expr_complex(arg, NULL);
 105         sm_msg("absolute min: %s = %lld", name, val);
 106         free_string(name);
 107 }
 108
 109 static void match_print_absolute_max(const char *fn, struct expression *expr, void *info)
 110 {
 111         struct expression *arg;
 112         long long val;
 113         char *name;
 114
 115         arg = get_argument_from_call_expr(expr->args, 0);
 116         if (!get_absolute_max(arg, &val))
 117                 val = whole_range.max;
 118
 119         name = get_variable_from_expr_complex(arg, NULL);
 120         sm_msg("absolute max: %s = %lld", name, val);
 121         free_string(name);
 122 }
 123
 124 static void print_possible(struct sm_state *sm)
 125 {
 126         struct sm_state *tmp;
 127
 128         sm_msg("Possible values for %s", sm->name);
 129         FOR_EACH_PTR(sm->possible, tmp) {
 130                 printf("%s\n", tmp->state->name);
 131         } END_FOR_EACH_PTR(tmp);
 132         sm_msg("===");
 133 }
 134
 135 static void match_possible(const char *fn, struct expression *expr, void *info)
 136 {
 137         struct state_list *slist;
 138         struct sm_state *tmp;
 139         struct expression *arg_expr;
 140
 141         arg_expr = get_argument_from_call_expr(expr->args, 0);
 142         if (arg_expr->type != EXPR_STRING) {
 143                 sm_msg("error:  the argument to %s is supposed to be a string literal", fn);
 144                 return;
 145         }
 146
 147         slist = get_all_states(SMATCH_EXTRA);
 148         FOR_EACH_PTR(slist, tmp) {
 149                 if (!strcmp(tmp->name, arg_expr->string->data))
 150                         print_possible(tmp);
 151         } END_FOR_EACH_PTR(tmp);
 152         free_slist(&slist);
 153 }
 154
 155 static void match_buf_size(const char *fn, struct expression *expr, void *info)
 156 {
 157         struct expression *arg;
 158         int elements, bytes;
 159         char *name;
 160
 161         arg = get_argument_from_call_expr(expr->args, 0);
 162         elements = get_array_size(arg);
 163         bytes = get_array_size_bytes(arg);
 164
 165         name = get_variable_from_expr_complex(arg, NULL);
 166         sm_msg("buf size: '%s' %d elements, %d bytes", name, elements, bytes);
 167         free_string(name);
 168 }
 169
 170 static void match_note(const char *fn, struct expression *expr, void *info)
 171 {
 172         struct expression *arg_expr;
 173
 174         arg_expr = get_argument_from_call_expr(expr->args, 0);
 175         if (arg_expr->type != EXPR_STRING) {
 176                 sm_msg("error:  the argument to %s is supposed to be a string literal", fn);
 177                 return;
 178         }
 179         sm_msg("%s", arg_expr->string->data);
 180 }
 181
 182 static void print_related(struct sm_state *sm)
 183 {
 184         struct relation *rel;
 185
 186         if (!estate_related(sm->state))
 187                 return;
 188
 189         sm_prefix();
 190         sm_printf("%s: ", sm->name);
 191         FOR_EACH_PTR(estate_related(sm->state), rel) {
 192                 sm_printf("%s %s ", show_special(rel->op), rel->name);
 193         } END_FOR_EACH_PTR(rel);
 194         sm_printf("\n");
 195 }
 196
 197 static void match_dump_related(const char *fn, struct expression *expr, void *info)
 198 {
 199         struct state_list *slist;
 200         struct sm_state *tmp;
 201
 202         slist = get_all_states(SMATCH_EXTRA);
 203         FOR_EACH_PTR(slist, tmp) {
 204                 print_related(tmp);
 205         } END_FOR_EACH_PTR(tmp);
 206         free_slist(&slist);
 207 }
 208
 209 static void match_debug_on(const char *fn, struct expression *expr, void *info)
 210 {
 211         option_debug = 1;
 212 }
 213
 214 static void match_debug_off(const char *fn, struct expression *expr, void *info)
 215 {
 216         option_debug = 0;
 217 }
 218
 219 void check_debug(int id)
 220 {
 221         my_id = id;
 222         add_function_hook("__smatch_all_values", &match_all_values, NULL);
 223         add_function_hook("__smatch_value", &match_print_value, NULL);
 224         add_function_hook("__smatch_implied", &match_print_implied, NULL);
 225         add_function_hook("__smatch_implied_min", &match_print_implied_min, NULL);
 226         add_function_hook("__smatch_implied_max", &match_print_implied_max, NULL);
 227         add_function_hook("__smatch_absolute_min", &match_print_absolute_min, NULL);
 228         add_function_hook("__smatch_absolute_max", &match_print_absolute_max, NULL);
 229         add_function_hook("__smatch_possible", &match_possible, NULL);
 230         add_function_hook("__smatch_cur_slist", &match_cur_slist, NULL);
 231         add_function_hook("__smatch_buf_size", &match_buf_size, NULL);
 232         add_function_hook("__smatch_note", &match_note, NULL);
 233         add_function_hook("__smatch_dump_related", &match_dump_related, NULL);
 234         add_function_hook("__smatch_debug_on", &match_debug_on, NULL);
 235         add_function_hook("__smatch_debug_off", &match_debug_off, NULL);
 236 }