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11972 resync smatch
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--- old/usr/src/tools/smatch/src/smatch_assigned_expr.c
+++ new/usr/src/tools/smatch/src/smatch_assigned_expr.c
1 1 /*
2 2 * Copyright (C) 2009 Dan Carpenter.
3 3 *
4 4 * This program is free software; you can redistribute it and/or
5 5 * modify it under the terms of the GNU General Public License
6 6 * as published by the Free Software Foundation; either version 2
7 7 * of the License, or (at your option) any later version.
8 8 *
9 9 * This program is distributed in the hope that it will be useful,
10 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 12 * GNU General Public License for more details.
13 13 *
14 14 * You should have received a copy of the GNU General Public License
15 15 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
16 16 */
17 17
18 18 /*
19 19 * This is not a check. It just saves an struct expression pointer
20 20 * whenever something is assigned. This can be used later on by other scripts.
21 21 */
22 22
23 23 #include "smatch.h"
24 24 #include "smatch_slist.h"
25 25 #include "smatch_extra.h"
26 26
27 27 int check_assigned_expr_id;
28 28 static int my_id;
29 29 static int link_id;
30 30
31 31 static struct expression *skip_mod;
32 32
33 33 static void undef(struct sm_state *sm, struct expression *mod_expr)
34 34 {
35 35 if (mod_expr == skip_mod)
36 36 return;
37 37 set_state(my_id, sm->name, sm->sym, &undefined);
38 38 }
39 39
40 40 struct expression *get_assigned_expr(struct expression *expr)
41 41 {
42 42 struct smatch_state *state;
43 43
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44 44 state = get_state_expr(my_id, expr);
45 45 if (!state)
46 46 return NULL;
47 47 return (struct expression *)state->data;
48 48 }
49 49
50 50 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym)
51 51 {
52 52 struct smatch_state *state;
53 53
54 - state = get_state(my_id, name, sym);
54 + state = __get_state(my_id, name, sym);
55 55 if (!state)
56 56 return NULL;
57 57 return (struct expression *)state->data;
58 58 }
59 59
60 60 static void match_assignment(struct expression *expr)
61 61 {
62 62 static struct expression *ignored_expr;
63 63 struct symbol *left_sym, *right_sym;
64 64 char *left_name = NULL;
65 65 char *right_name = NULL;
66 66
67 67 if (expr->op != '=')
68 68 return;
69 69 if (is_fake_call(expr->right))
70 70 return;
71 71 if (__in_fake_struct_assign) {
72 72 struct range_list *rl;
73 73
74 74 if (!get_implied_rl(expr->right, &rl))
75 75 return;
76 76 if (is_whole_rl(rl))
77 77 return;
78 78 }
79 79
80 80 if (expr->left == ignored_expr)
81 81 return;
82 82 ignored_expr = NULL;
83 83 if (__in_fake_parameter_assign)
84 84 ignored_expr = expr->left;
85 85
86 86 left_name = expr_to_var_sym(expr->left, &left_sym);
87 87 if (!left_name || !left_sym)
88 88 goto free;
89 89 set_state(my_id, left_name, left_sym, alloc_state_expr(strip_expr(expr->right)));
90 90
91 91 right_name = expr_to_var_sym(expr->right, &right_sym);
92 92 if (!right_name || !right_sym)
93 93 goto free;
94 94
95 95 store_link(link_id, right_name, right_sym, left_name, left_sym);
96 96
97 97 free:
98 98 free_string(left_name);
99 99 free_string(right_name);
100 100 }
101 101
102 102 static void record_param_assignment(struct expression *expr, int param, char *key, char *value)
103 103 {
104 104 struct expression *arg, *right;
105 105 struct symbol *sym;
106 106 char *name;
107 107 char *p;
108 108 int right_param;
109 109
110 110 while (expr->type == EXPR_ASSIGNMENT)
111 111 expr = strip_expr(expr->right);
112 112 if (!expr || expr->type != EXPR_CALL)
113 113 return;
114 114
115 115 p = strstr(value, "[$");
116 116 if (!p)
117 117 return;
118 118
119 119 p += 2;
120 120 right_param = strtol(p, &p, 10);
121 121 if (*p != ']')
122 122 return;
123 123
124 124 arg = get_argument_from_call_expr(expr->args, param);
125 125 right = get_argument_from_call_expr(expr->args, right_param);
126 126 if (!right || !arg)
127 127 return;
128 128 name = get_variable_from_key(arg, key, &sym);
129 129 if (!name || !sym)
130 130 goto free;
131 131
132 132 skip_mod = expr;
133 133 set_state(my_id, name, sym, alloc_state_expr(right));
134 134 free:
135 135 free_string(name);
136 136 }
137 137
138 138 void register_assigned_expr(int id)
139 139 {
140 140 my_id = check_assigned_expr_id = id;
141 141 set_dynamic_states(check_assigned_expr_id);
142 142 add_hook(&match_assignment, ASSIGNMENT_HOOK_AFTER);
143 143 add_modification_hook(my_id, &undef);
144 144 select_return_states_hook(PARAM_SET, &record_param_assignment);
145 145 }
146 146
147 147 void register_assigned_expr_links(int id)
148 148 {
149 149 link_id = id;
150 150 set_dynamic_states(link_id);
151 151 db_ignore_states(link_id);
152 152 set_up_link_functions(my_id, link_id);
153 153 }
154 154
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