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 struct member_info_callback
{
29 void (*callback
)(char *fn
, int param
, char *printed_name
, struct smatch_state
*state
);
31 ALLOCATOR(member_info_callback
, "caller_info callbacks");
32 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
33 static struct member_info_cb_list
*member_callbacks
;
35 void sql_exec(int (*callback
)(void*, int, char**, char**), const char *sql
)
40 if (option_no_db
|| !db
)
43 rc
= sqlite3_exec(db
, sql
, callback
, 0, &err
);
44 if (rc
!= SQLITE_OK
) {
45 fprintf(stderr
, "SQL error #2: %s\n", err
);
50 void add_definition_db_callback(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
52 struct def_callback
*def_callback
= __alloc_def_callback(0);
54 def_callback
->hook_type
= type
;
55 def_callback
->callback
= callback
;
56 add_ptr_list(&callbacks
, def_callback
);
59 void add_member_info_callback(int owner
, void (*callback
)(char *fn
, int param
, char *printed_name
, struct smatch_state
*state
))
61 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
63 member_callback
->owner
= owner
;
64 member_callback
->callback
= callback
;
65 add_ptr_list(&member_callbacks
, member_callback
);
68 static struct range_list
*return_range_list
;
69 static int db_return_callback(void *unused
, int argc
, char **argv
, char **azColName
)
71 struct range_list
*rl
= NULL
;
76 get_value_ranges(argv
[0], &rl
);
77 return_range_list
= range_list_union(return_range_list
, rl
);
82 struct range_list
*db_return_vals(struct expression
*expr
)
85 static char sql_filter
[1024];
87 if (expr
->type
!= EXPR_CALL
)
89 if (expr
->fn
->type
!= EXPR_SYMBOL
)
91 sym
= expr
->fn
->symbol
;
95 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
96 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
97 get_filename(), sym
->ident
->name
);
99 snprintf(sql_filter
, 1024, "function = '%s';", sym
->ident
->name
);
102 return_range_list
= NULL
;
103 run_sql(db_return_callback
, "select value from return_info where %s",
105 return return_range_list
;
108 static void match_call_hack(struct expression
*expr
)
113 * we just want to record something in the database so that if we have
114 * two calls like: frob(4); frob(some_unkown); then on the recieving
115 * side we know that sometimes frob is called with unknown parameters.
118 name
= get_fnptr_name(expr
->fn
);
121 if (ptr_list_empty(expr
->args
))
123 sm_msg("info: passes param_value '%s' -1 '$$' min-max", name
);
127 static void print_struct_members(char *fn
, struct expression
*expr
, int param
, struct state_list
*slist
,
128 void (*callback
)(char *fn
, int param
, char *printed_name
, struct smatch_state
*state
))
134 char printed_name
[256];
137 expr
= strip_expr(expr
);
138 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
139 expr
= strip_expr(expr
->unop
);
143 name
= get_variable_from_expr(expr
, &sym
);
148 FOR_EACH_PTR(slist
, sm
) {
151 if (strncmp(name
, sm
->name
, len
) || sm
->name
[len
] == '\0')
154 snprintf(printed_name
, sizeof(printed_name
), "$$->%s", sm
->name
+ len
+ 1);
156 snprintf(printed_name
, sizeof(printed_name
), "$$%s", sm
->name
+ len
);
157 callback(fn
, param
, printed_name
, sm
->state
);
158 } END_FOR_EACH_PTR(sm
);
163 static void match_call_info(struct expression
*expr
)
165 struct member_info_callback
*cb
;
166 struct expression
*arg
;
167 struct state_list
*slist
;
171 name
= get_fnptr_name(expr
->fn
);
175 FOR_EACH_PTR(member_callbacks
, cb
) {
176 slist
= get_all_states(cb
->owner
);
178 FOR_EACH_PTR(expr
->args
, arg
) {
179 print_struct_members(name
, arg
, i
, slist
, cb
->callback
);
181 } END_FOR_EACH_PTR(arg
);
182 } END_FOR_EACH_PTR(cb
);
188 static int get_param(int param
, char **name
, struct symbol
**sym
)
194 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
196 * this is a temporary hack to work around a bug (I think in sparse?)
197 * 2.6.37-rc1:fs/reiserfs/journal.o
198 * If there is a function definition without parameter name found
199 * after a function implementation then it causes a crash.
203 if (arg
->ident
->name
< (char *)100)
205 if (i
== param
&& arg
->ident
->name
) {
206 *name
= arg
->ident
->name
;
211 } END_FOR_EACH_PTR(arg
);
216 static struct state_list
*final_states
;
217 static int prev_func_id
= -1;
218 static int db_callback(void *unused
, int argc
, char **argv
, char **azColName
)
225 struct def_callback
*def_callback
;
230 func_id
= atoi(argv
[0]);
232 type
= strtol(argv
[1], NULL
, 10);
233 param
= strtol(argv
[2], NULL
, 10);
237 if (prev_func_id
== -1)
238 prev_func_id
= func_id
;
239 if (func_id
!= prev_func_id
) {
240 merge_slist(&final_states
, __pop_fake_cur_slist());
241 __push_fake_cur_slist();
243 prev_func_id
= func_id
;
246 if (param
== -1 || !get_param(param
, &name
, &sym
))
249 FOR_EACH_PTR(callbacks
, def_callback
) {
250 if (def_callback
->hook_type
== type
)
251 def_callback
->callback(name
, sym
, argv
[3], argv
[4]);
252 } END_FOR_EACH_PTR(def_callback
);
257 static void get_direct_callers(struct symbol
*sym
)
259 char sql_filter
[1024];
261 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
262 snprintf(sql_filter
, 1024,
263 "file = '%s' and function = '%s' order by function_id;",
264 get_filename(), sym
->ident
->name
);
266 snprintf(sql_filter
, 1024,
267 "function = '%s' order by function_id;",
271 run_sql(db_callback
, "select function_id, type, parameter, key, value from caller_info"
272 " where %s", sql_filter
);
275 static char *ptr_name
;
276 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
279 ptr_name
= alloc_string(argv
[0]);
283 static void get_function_pointer_callers(struct symbol
*sym
)
286 run_sql(get_ptr_name
, "select ptr from function_ptr where function = '%s'",
291 run_sql(db_callback
, "select function_id, type, parameter, key, value from caller_info"
292 " where function = '%s' order by function_id", ptr_name
);
295 static void match_data_from_db(struct symbol
*sym
)
299 if (!sym
|| !sym
->ident
|| !sym
->ident
->name
)
302 __push_fake_cur_slist();
306 get_direct_callers(sym
);
307 get_function_pointer_callers(sym
);
309 merge_slist(&final_states
, __pop_fake_cur_slist());
311 FOR_EACH_PTR(final_states
, sm
) {
313 } END_FOR_EACH_PTR(sm
);
315 free_slist(&final_states
);
318 static void match_function_assign(struct expression
*expr
)
320 struct expression
*right
= expr
->right
;
325 if (right
->type
== EXPR_PREOP
&& right
->op
== '&')
327 if (right
->type
!= EXPR_SYMBOL
)
329 sym
= get_type(right
);
330 if (!sym
|| sym
->type
!= SYM_FN
)
333 fn_name
= get_variable_from_expr(right
, NULL
);
334 ptr_name
= get_fnptr_name(expr
->left
);
335 if (!fn_name
|| !ptr_name
)
338 sm_msg("info: sets_fn_ptr '%s' '%s'", ptr_name
, fn_name
);
341 free_string(fn_name
);
342 free_string(ptr_name
);
345 static void print_initializer_list(struct expression_list
*expr_list
,
346 struct symbol
*struct_type
)
348 struct expression
*expr
;
349 struct symbol
*base_type
;
351 FOR_EACH_PTR(expr_list
, expr
) {
352 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
353 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
356 if (expr
->type
!= EXPR_IDENTIFIER
)
358 if (!expr
->expr_ident
)
360 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
362 base_type
= get_type(expr
->ident_expression
);
363 if (!base_type
|| base_type
->type
!= SYM_FN
)
365 sm_msg("info: sets_fn_ptr '(struct %s)->%s' '%s'", struct_type
->ident
->name
,
366 expr
->expr_ident
->name
,
367 expr
->ident_expression
->symbol_name
->name
);
368 } END_FOR_EACH_PTR(expr
);
372 static void global_variable(struct symbol
*sym
)
374 struct symbol
*struct_type
;
378 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
380 struct_type
= get_base_type(sym
);
383 if (struct_type
->type
== SYM_ARRAY
) {
384 struct_type
= get_base_type(struct_type
);
388 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
390 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
393 void open_smatch_db(void)
395 #ifdef SQLITE_OPEN_READONLY
401 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
402 if (rc
!= SQLITE_OK
) {
413 void register_definition_db_callbacks(int id
)
416 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
417 add_hook(&match_call_hack
, FUNCTION_CALL_HOOK
);
418 add_hook(&match_function_assign
, ASSIGNMENT_HOOK
);
419 add_hook(&global_variable
, BASE_HOOK
);
420 add_hook(&global_variable
, DECLARATION_HOOK
);
426 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);