db, kernel: when kmalloc() succeeds that implies the size was reasonable
[smatch.git] / smatch.c
blob6423c782385250a82d0d9a777f51cb2cad2541f0
1 /*
2 * Copyright (C) 2006 Dan Carpenter.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
18 #include <stdio.h>
19 #include <unistd.h>
20 #include <libgen.h>
21 #include "smatch.h"
22 #include "check_list.h"
24 char *option_debug_check = (char *)"";
25 char *option_project_str = (char *)"";
26 enum project_type option_project = PROJ_NONE;
27 char *data_dir;
28 int option_no_data = 0;
29 int option_spammy = 0;
30 int option_info = 0;
31 int option_full_path = 0;
32 int option_param_mapper = 0;
33 int option_call_tree = 0;
34 int option_no_db = 0;
35 int option_debug_related;
36 int option_file_output;
37 int option_time;
38 char *option_datadir_str;
39 FILE *sm_outfd;
41 typedef void (*reg_func) (int id);
42 #define CK(_x) {.name = #_x, .func = &_x},
43 static struct reg_func_info {
44 const char *name;
45 reg_func func;
46 } reg_funcs[] = {
47 #include "check_list.h"
49 #undef CK
50 int num_checks = ARRAY_SIZE(reg_funcs);
52 const char *check_name(unsigned short id)
54 if (id > ARRAY_SIZE(reg_funcs))
55 return "internal";
57 return reg_funcs[id - 1].name;
60 int id_from_name(const char *name)
62 int i;
64 for (i = 0; i < ARRAY_SIZE(reg_funcs); i++) {
65 if (!strcmp(name, reg_funcs[i].name))
66 return i + 1;
68 return 0;
71 static void help(void)
73 printf("Usage: smatch [smatch arguments][sparse arguments] file.c\n");
74 printf("--project=<name> or -p=<name>: project specific tests\n");
75 printf("--spammy: print superfluous crap.\n");
76 printf("--info: print info used to fill smatch_data/.\n");
77 printf("--debug: print lots of debug output.\n");
78 printf("--param-mapper: enable param_mapper output.\n");
79 printf("--no-data: do not use the /smatch_data/ directory.\n");
80 printf("--data=<dir>: overwrite path to default smatch data directory.\n");
81 printf("--full-path: print the full pathname.\n");
82 printf("--debug-implied: print debug output about implications.\n");
83 printf("--no-implied: ignore implications.\n");
84 printf("--assume-loops: assume loops always go through at least once.\n");
85 printf("--known-conditions: don't branch for known conditions.\n");
86 printf("--two-passes: use a two pass system for each function.\n");
87 printf("--file-output: instead of printing stdout, print to \"file.c.smatch_out\".\n");
88 printf("--help: print this helpful message.\n");
89 exit(1);
92 static int match_option(const char *arg, const char *option)
94 char *str;
95 char *tmp;
96 int ret = 0;
98 str = malloc(strlen(option) + 3);
99 snprintf(str, strlen(option) + 3, "--%s", option);
100 tmp = str;
101 while (*tmp) {
102 if (*tmp == '_')
103 *tmp = '-';
104 tmp++;
106 if (!strcmp(arg, str))
107 ret = 1;
108 free(str);
109 return ret;
112 #define OPTION(_x) do { \
113 if (!found && match_option((*argvp)[1], #_x)) { \
114 found = 1; \
115 option_##_x = 1; \
116 (*argvp)[1] = (*argvp)[0]; \
118 } while (0)
120 void parse_args(int *argcp, char ***argvp)
122 while (*argcp >= 2) {
123 int found = 0;
124 if (!strcmp((*argvp)[1], "--help"))
125 help();
127 if (!found && !strncmp((*argvp)[1], "--project=", 10)) {
128 option_project_str = (*argvp)[1] + 10;
129 (*argvp)[1] = (*argvp)[0];
130 found = 1;
132 if (!found && !strncmp((*argvp)[1], "-p=", 3)) {
133 option_project_str = (*argvp)[1] + 3;
134 (*argvp)[1] = (*argvp)[0];
135 found = 1;
137 if (!found && !strncmp((*argvp)[1], "--data=", 7)) {
138 option_datadir_str = (*argvp)[1] + 7;
139 (*argvp)[1] = (*argvp)[0];
140 found = 1;
142 if (!found && !strncmp((*argvp)[1], "--debug=", 8)) {
143 option_debug_check = (*argvp)[1] + 8;
144 (*argvp)[1] = (*argvp)[0];
145 found = 1;
148 OPTION(spammy);
149 OPTION(info);
150 OPTION(debug);
151 OPTION(debug_implied);
152 OPTION(debug_related);
153 OPTION(no_implied);
154 OPTION(assume_loops);
155 OPTION(known_conditions);
156 OPTION(no_data);
157 OPTION(two_passes);
158 OPTION(full_path);
159 OPTION(param_mapper);
160 OPTION(call_tree);
161 OPTION(file_output);
162 OPTION(time);
163 if (!found)
164 break;
165 (*argcp)--;
166 (*argvp)++;
169 if (!strcmp(option_project_str, "kernel"))
170 option_project = PROJ_KERNEL;
171 if (!strcmp(option_project_str, "wine"))
172 option_project = PROJ_WINE;
175 static char *get_data_dir(char *arg0)
177 char *bin_dir;
178 char *orig;
179 char buf[256];
180 char *dir;
182 if (option_no_data)
183 return NULL;
185 if (option_datadir_str) {
186 if (access(option_datadir_str, R_OK))
187 printf("Warning: %s is not accessible -- ignore.\n",
188 option_datadir_str);
189 else
190 return alloc_string(option_datadir_str);
193 orig = alloc_string(arg0);
194 bin_dir = dirname(orig);
195 strncpy(buf, bin_dir, 254);
196 free_string(orig);
198 buf[255] = '\0';
199 strncat(buf, "/smatch_data/", 254 - strlen(buf));
200 dir = alloc_string(buf);
201 if (!access(dir, R_OK))
202 return dir;
203 free_string(dir);
204 snprintf(buf, 254, "%s/smatch_data/", SMATCHDATADIR);
205 dir = alloc_string(buf);
206 if (!access(dir, R_OK))
207 return dir;
209 printf("Warning: %s is not accessible.\n", dir);
210 printf("Use --no-data or --data to suppress this message.\n");
211 return NULL;
214 int main(int argc, char **argv)
216 int i;
217 reg_func func;
219 sm_outfd = stdout;
220 parse_args(&argc, &argv);
222 /* this gets set back to zero when we parse the first function */
223 final_pass = 1;
225 data_dir = get_data_dir(argv[0]);
227 create_function_hook_hash();
228 open_smatch_db();
229 for (i = 0; i < ARRAY_SIZE(reg_funcs); i++) {
230 func = reg_funcs[i].func;
231 /* The script IDs start at 1.
232 0 is used for internal stuff. */
233 func(i + 1);
236 smatch(argc, argv);
237 free_string(data_dir);
238 return 0;