4 * Copyright (C) 2010 Dan Carpenter.
6 * Licensed under the Open Software License version 1.1
14 #include "smatch_slist.h"
15 #include "smatch_extra.h"
21 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
23 ALLOCATOR(def_callback
, "definition db hook callbacks");
24 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
25 static struct callback_list
*callbacks
;
27 void sql_exec(int (*callback
)(void*, int, char**, char**), const char *sql
)
32 if (option_no_db
|| !db
)
35 rc
= sqlite3_exec(db
, sql
, callback
, 0, &err
);
36 if (rc
!= SQLITE_OK
) {
37 fprintf(stderr
, "SQL error #2: %s\n", err
);
42 void add_definition_db_callback(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
44 struct def_callback
*def_callback
= __alloc_def_callback(0);
46 def_callback
->hook_type
= type
;
47 def_callback
->callback
= callback
;
48 add_ptr_list(&callbacks
, def_callback
);
51 static void match_call_hack(struct expression
*expr
)
56 * we just want to record something in the database so that if we have
57 * two calls like: frob(4); frob(some_unkown); then on the recieving
58 * side we know that sometimes frob is called with unknown parameters.
61 name
= get_fnptr_name(expr
->fn
);
64 if (ptr_list_empty(expr
->args
))
66 sm_msg("info: passes param_value '%s' -1 '$$' min-max", name
);
70 static unsigned long call_count
;
71 static int db_count_callback(void *unused
, int argc
, char **argv
, char **azColName
)
73 call_count
= strtoul(argv
[0], NULL
, 10);
77 static int get_param(int param
, char **name
, struct symbol
**sym
)
83 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
85 * this is a temporary hack to work around a bug (I think in sparse?)
86 * 2.6.37-rc1:fs/reiserfs/journal.o
87 * If there is a function definition without parameter name found
88 * after a function implementation then it causes a crash.
92 if (arg
->ident
->name
< (char *)100)
94 if (i
== param
&& arg
->ident
->name
) {
95 *name
= arg
->ident
->name
;
100 } END_FOR_EACH_PTR(arg
);
105 static struct state_list
*final_states
;
106 static int prev_func_id
= -1;
107 static int db_callback(void *unused
, int argc
, char **argv
, char **azColName
)
114 struct def_callback
*def_callback
;
119 func_id
= atoi(argv
[0]);
121 type
= strtol(argv
[1], NULL
, 10);
122 param
= strtol(argv
[2], NULL
, 10);
126 if (prev_func_id
== -1)
127 prev_func_id
= func_id
;
128 if (func_id
!= prev_func_id
) {
129 merge_slist(&final_states
, __pop_fake_cur_slist());
130 __push_fake_cur_slist();
131 prev_func_id
= func_id
;
134 if (param
== -1 || !get_param(param
, &name
, &sym
))
137 FOR_EACH_PTR(callbacks
, def_callback
) {
138 if (def_callback
->hook_type
== type
)
139 def_callback
->callback(name
, sym
, argv
[3], argv
[4]);
140 } END_FOR_EACH_PTR(def_callback
);
145 static void get_direct_callers(struct symbol
*sym
)
147 char sql_filter
[1024];
149 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
150 snprintf(sql_filter
, 1024,
151 "file = '%s' and function = '%s' order by function_id;",
152 get_filename(), sym
->ident
->name
);
154 snprintf(sql_filter
, 1024,
155 "function = '%s' order by function_id;",
160 run_sql(db_count_callback
, "select count(*) from caller_info where %s",
162 if (call_count
== 0 || call_count
> 100)
165 run_sql(db_callback
, "select function_id, type, parameter, key, value from caller_info"
166 " where %s", sql_filter
);
169 static char *ptr_name
;
170 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
173 ptr_name
= alloc_string(argv
[0]);
177 static void get_function_pointer_callers(struct symbol
*sym
)
180 run_sql(get_ptr_name
, "select ptr from function_ptr where function = '%s'",
185 run_sql(db_callback
, "select function_id, type, parameter, key, value from caller_info"
186 " where function = '%s' order by function_id", ptr_name
);
189 static void match_data_from_db(struct symbol
*sym
)
193 if (!sym
|| !sym
->ident
|| !sym
->ident
->name
)
196 __push_fake_cur_slist();
199 get_direct_callers(sym
);
200 get_function_pointer_callers(sym
);
202 merge_slist(&final_states
, __pop_fake_cur_slist());
204 FOR_EACH_PTR(final_states
, sm
) {
206 } END_FOR_EACH_PTR(sm
);
208 free_slist(&final_states
);
211 static void match_function_assign(struct expression
*expr
)
213 struct expression
*right
= expr
->right
;
218 if (right
->type
== EXPR_PREOP
&& right
->op
== '&')
220 if (right
->type
!= EXPR_SYMBOL
)
222 sym
= get_type(right
);
223 if (!sym
|| sym
->type
!= SYM_FN
)
226 fn_name
= get_variable_from_expr(right
, NULL
);
227 ptr_name
= get_fnptr_name(expr
->left
);
228 if (!fn_name
|| !ptr_name
)
231 sm_msg("info: sets_fn_ptr '%s' '%s'", ptr_name
, fn_name
);
234 free_string(fn_name
);
235 free_string(ptr_name
);
238 static void global_variable(struct symbol
*sym
)
240 struct symbol
*struct_type
;
241 struct symbol
*base_type
;
242 struct expression
*expr
;
246 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
248 struct_type
= get_base_type(sym
);
249 if (!struct_type
|| struct_type
->type
!= SYM_STRUCT
||
253 FOR_EACH_PTR(sym
->initializer
->expr_list
, expr
) {
254 if (expr
->type
!= EXPR_IDENTIFIER
)
256 if (!expr
->expr_ident
)
258 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
260 base_type
= get_type(expr
->ident_expression
);
261 if (!base_type
|| base_type
->type
!= SYM_FN
)
263 sm_msg("info: sets_fn_ptr '(struct %s)->%s' '%s'", struct_type
->ident
->name
,
264 expr
->expr_ident
->name
,
265 expr
->ident_expression
->symbol_name
->name
);
266 } END_FOR_EACH_PTR(expr
);
269 void open_smatch_db(void)
271 #ifdef SQLITE_OPEN_READONLY
277 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
278 if (rc
!= SQLITE_OK
) {
289 void register_definition_db_callbacks(int id
)
292 add_hook(&match_call_hack
, FUNCTION_CALL_HOOK
);
293 add_hook(&match_function_assign
, ASSIGNMENT_HOOK
);
294 add_hook(&global_variable
, BASE_HOOK
);
295 add_hook(&global_variable
, DECLARATION_HOOK
);
301 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);