smatch.c

   1 /*
   2  * sparse/smatch.c
   3  *
   4  * Copyright (C) 2006 Dan Carpenter.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #include <stdio.h>
  11 #include <unistd.h>
  12 #include <libgen.h>
  13 #include "smatch.h"
  14
  15 char *data_dir;
  16 int option_no_data = 0;
  17
  18 typedef void (*reg_func) (int id);
  19 void register_smatch_extra(int id);
  20 void register_smatch_ignore(int id);
  21 void register_implications(int id);
  22 void register_function_hooks(int id);
  23 void check_null_deref(int id);
  24 void check_overflow(int id);
  25 void check_locking(int id);
  26 void check_memory(int id);
  27 void check_frees_argument(int id);
  28 void check_leaks(int id);
  29 void check_type(int id);
  30 void check_allocation_funcs(int id);
  31 /* <- your test goes here */
  32 /* void register_template(int id); */
  33
  34 static const reg_func reg_funcs[] = {
  35         &register_smatch_extra, /* smatch_extra always has to be first */
  36         &register_smatch_ignore,
  37         &check_null_deref,
  38         &check_overflow,
  39         &check_locking,
  40         &check_memory,
  41         // &check_type,
  42         // &check_allocation_funcs,
  43         // &check_leaks,
  44         // &check_frees_argument,
  45
  46         /* <- your test goes here */
  47         /* &register_template, */
  48
  49         &register_implications, /* implications always has to be last */
  50         NULL
  51 };
  52
  53 static void help(void)
  54 {
  55         printf("Usage:  smatch [smatch arguments][sparse arguments] file.c\n");
  56         printf("--debug:  print lots of debug output.\n");
  57         printf("--debug-implied:  print debug output about implications.\n");
  58         printf("--no-implied:  ignore implications.\n");
  59         printf("--assume-loops:  assume loops always go through at least once.\n");
  60         printf("--known-conditions:  don't branch for known conditions.\n");
  61         printf("--no-data:  do not use the /smatch_data/ directory.\n");
  62         printf("--help:  print this helpfull message.\n");
  63         exit(1);
  64 }
  65
  66 void parse_args(int *argcp, char ***argvp)
  67 {
  68         while(*argcp >= 2) {
  69                 if (!strcmp((*argvp)[1], "--debug")) {
  70                         debug_states = 1;
  71                         (*argvp)[1] = (*argvp)[0];
  72                 } else if (!strcmp((*argvp)[1], "--debug-implied")) {
  73                         debug_implied_states = 1;
  74                         (*argvp)[1] = (*argvp)[0];
  75                 } else if (!strcmp((*argvp)[1], "--no-implied")) {
  76                         option_no_implied = 1;
  77                         (*argvp)[1] = (*argvp)[0];
  78                 } else if (!strcmp((*argvp)[1], "--assume-loops")) {
  79                         option_assume_loops = 1;
  80                         (*argvp)[1] = (*argvp)[0];
  81                 } else if (!strcmp((*argvp)[1], "--known-conditions")) {
  82                         option_known_conditions = 1;
  83                         (*argvp)[1] = (*argvp)[0];
  84                 } else if (!strcmp((*argvp)[1], "--no-data")) {
  85                         option_no_data = 1;
  86                         (*argvp)[1] = (*argvp)[0];
  87                 } else if (!strcmp((*argvp)[1], "--help")) {
  88                         help();
  89                 } else {
  90                         break;
  91                 }
  92                 (*argcp)--;
  93                 (*argvp)++;
  94         }
  95 }
  96
  97 static char *get_data_dir(char *arg0)
  98 {
  99         char *bin_dir;
 100         char buf[256];
 101         char *dir;
 102
 103         if (option_no_data) {
 104                 return NULL;
 105         }
 106         bin_dir = dirname(alloc_string(arg0));
 107         strncpy(buf, bin_dir, 254);
 108         buf[255] = '\0';
 109         strncat(buf, "/smatch_data/", 254);
 110         dir = alloc_string(buf);
 111         if (!access(dir, R_OK))
 112                 return dir;
 113         printf("Warning: %s is not accessible.\n", dir);
 114         printf("Use --no-data to suppress this message.\n");
 115         return NULL;
 116 }
 117
 118 int main(int argc, char **argv)
 119 {
 120         int i;
 121         reg_func func;
 122
 123         parse_args(&argc, &argv);
 124
 125         data_dir = get_data_dir(argv[0]);
 126
 127         /* The script IDs start at 1.
 128            0 is used for internal stuff. */
 129         create_function_hash();
 130         for(i = 0; (func = reg_funcs[i]); i++){
 131                 func(i + 1);
 132         }
 133         register_function_hooks(-1);
 134
 135         smatch(argc, argv);
 136         free_string(data_dir);
 137         return 0;
 138 }