check.c

   1 /*
   2  * Example trivial client program that uses the sparse library
   3  * to tokenize, pre-process and parse a C file, and prints out
   4  * the results.
   5  *
   6  * Copyright (C) 2003 Transmeta Corp.
   7  *               2003 Linus Torvalds
   8  *
   9  *  Licensed under the Open Software License version 1.1
  10  */
  11 #include <stdarg.h>
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <ctype.h>
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18
  19 #include "lib.h"
  20 #include "token.h"
  21 #include "parse.h"
  22 #include "symbol.h"
  23 #include "expression.h"
  24
  25 static void clean_up_symbol(struct symbol *sym, void *_parent, int flags)
  26 {
  27         check_duplicates(sym);
  28         evaluate_symbol(sym);
  29         expand_symbol(sym);
  30 }
  31
  32 int main(int argc, char **argv)
  33 {
  34         int fd;
  35         char *filename = NULL, **args;
  36         struct token *token;
  37
  38         // Initialize symbol stream first, so that we can add defines etc
  39         init_symbols();
  40
  41         create_builtin_stream();
  42         add_pre_buffer("#define __CHECKER__ 1\n");
  43         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, unsigned long);\n");
  44         add_pre_buffer("extern void *__builtin_return_address(int);\n");
  45         add_pre_buffer("extern void *__builtin_memset(void *, int, unsigned long);\n");
  46
  47         args = argv;
  48         for (;;) {
  49                 char *arg = *++args;
  50                 if (!arg)
  51                         break;
  52                 if (arg[0] == '-') {
  53                         args = handle_switch(arg+1, args);
  54                         continue;
  55                 }
  56                 filename = arg;
  57         }
  58
  59         // Initialize type system
  60         init_ctype();
  61
  62         fd = open(filename, O_RDONLY);
  63         if (fd < 0)
  64                 die("No such file: %s", filename);
  65
  66         // Tokenize the input stream
  67         token = tokenize(filename, fd, NULL);
  68         close(fd);
  69
  70         // Prepend any "include" file to the stream.
  71         if (include_fd >= 0)
  72                 token = tokenize(include, include_fd, token);
  73
  74         // Prepend the initial built-in stream
  75         token = tokenize_buffer(pre_buffer, pre_buffer_size, token);
  76
  77         // Pre-process the stream
  78         token = preprocess(token);
  79
  80         if (preprocess_only) {
  81                 while (!eof_token(token)) {
  82                         int prec = 1;
  83                         struct token *next = token->next;
  84                         char * separator = "";
  85                         if (next->pos.whitespace)
  86                                 separator = " ";
  87                         if (next->pos.newline) {
  88                                 separator = "\n\t\t\t\t\t";
  89                                 prec = next->pos.pos;
  90                                 if (prec > 4)
  91                                         prec = 4;
  92                         }
  93                         printf("%s%.*s", show_token(token), prec, separator);
  94                         token = next;
  95                 }
  96                 putchar('\n');
  97
  98                 return 0;
  99         }
 100
 101         // Parse the resulting C code
 102         translation_unit(token, &used_list);
 103
 104         // Do type evaluation and simplify
 105         symbol_iterate(used_list, clean_up_symbol, NULL);
 106         return 0;
 107 }