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11972 resync smatch
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--- old/usr/src/tools/smatch/src/smatch_returns.c
+++ new/usr/src/tools/smatch/src/smatch_returns.c
1 1 /*
2 2 * Copyright (C) 2011 Oracle.
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 #include "smatch.h"
19 19 #include "smatch_slist.h"
20 20 #include "smatch_extra.h"
21 21
22 22 int RETURN_ID;
23 23
24 24 struct return_states_callback {
25 25 void (*callback)(void);
26 26 };
27 27 ALLOCATOR(return_states_callback, "return states callbacks");
28 28 DECLARE_PTR_LIST(callback_list, struct return_states_callback);
29 29 static struct callback_list *callback_list;
30 30
31 31 DECLARE_PTR_LIST(stree_stack_stack, struct stree_stack);
32 32 static void push_stree_stack(struct stree_stack_stack **stack_stack, struct stree_stack *stack)
33 33 {
34 34 add_ptr_list(stack_stack, stack);
35 35 }
36 36
37 37 static struct stree_stack *pop_stree_stack(struct stree_stack_stack **stack_stack)
38 38 {
39 39 struct stree_stack *stack;
40 40
41 41 stack = last_ptr_list((struct ptr_list *)*stack_stack);
42 42 delete_ptr_list_last((struct ptr_list **)stack_stack);
43 43 return stack;
44 44 }
45 45
46 46 static struct stree_stack *return_stree_stack;
47 47 static struct stree_stack_stack *saved_stack_stack;
48 48 static struct stree *all_return_states;
49 49 static struct stree_stack *saved_stack;
50 50
51 51 void all_return_states_hook(void (*callback)(void))
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51 lines elided |
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52 52 {
53 53 struct return_states_callback *rs_cb = __alloc_return_states_callback(0);
54 54
55 55 rs_cb->callback = callback;
56 56 add_ptr_list(&callback_list, rs_cb);
57 57 }
58 58
59 59 static void call_hooks(void)
60 60 {
61 61 struct return_states_callback *rs_cb;
62 + struct stree *orig;
62 63
63 - __set_fake_cur_stree_fast(all_return_states);
64 + orig = __swap_cur_stree(all_return_states);
64 65 FOR_EACH_PTR(callback_list, rs_cb) {
65 66 rs_cb->callback();
66 67 } END_FOR_EACH_PTR(rs_cb);
67 - __pop_fake_cur_stree_fast();
68 + __swap_cur_stree(orig);
68 69 }
69 70
70 71 static void match_return(int return_id, char *return_ranges, struct expression *expr)
71 72 {
72 73 struct stree *stree;
73 74
74 75 stree = clone_stree(__get_cur_stree());
75 76 merge_stree_no_pools(&all_return_states, stree);
76 77 push_stree(&return_stree_stack, stree);
77 78 }
78 79
79 80 static void match_end_func(struct symbol *sym)
80 81 {
81 82 /*
82 83 * FIXME: either this isn't needed or we need to copy a stree into the
83 84 * return_stree_stack as well.
84 85 */
85 86 merge_stree(&all_return_states, __get_cur_stree());
86 87 call_hooks();
87 88 }
88 89
89 90 static void match_save_states(struct expression *expr)
90 91 {
91 92 push_stree(&saved_stack, all_return_states);
92 93 all_return_states = NULL;
93 94
94 95 push_stree_stack(&saved_stack_stack, return_stree_stack);
95 96 return_stree_stack = NULL;
96 97 }
97 98
98 99 static void match_restore_states(struct expression *expr)
99 100 {
100 101 /* This free_stree() isn't needed is it?? */
101 102 free_stree(&all_return_states);
102 103
103 104 all_return_states = pop_stree(&saved_stack);
104 105 return_stree_stack = pop_stree_stack(&saved_stack_stack);
105 106 }
106 107
107 108 struct stree *get_all_return_states(void)
108 109 {
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109 110 return all_return_states;
110 111 }
111 112
112 113 struct stree_stack *get_all_return_strees(void)
113 114 {
114 115 return return_stree_stack;
115 116 }
116 117
117 118 static void free_resources(struct symbol *sym)
118 119 {
119 - struct stree *tmp;
120 -
121 120 free_stree(&all_return_states);
122 -
123 - FOR_EACH_PTR(return_stree_stack, tmp) {
124 - free_stree(&tmp);
125 - } END_FOR_EACH_PTR(tmp);
126 - free_stree_stack(&return_stree_stack);
121 + free_stack_and_strees(&return_stree_stack);
127 122 }
128 123
129 124 void register_returns_early(int id)
130 125 {
131 126 RETURN_ID = id;
132 127
133 128 set_dynamic_states(RETURN_ID);
134 129 add_split_return_callback(match_return);
135 130 }
136 131
137 132 void register_returns(int id)
138 133 {
139 134 add_hook(&match_end_func, END_FUNC_HOOK);
140 135 add_hook(&match_save_states, INLINE_FN_START);
141 136 add_hook(&match_restore_states, INLINE_FN_END);
142 137 add_hook(&free_resources, AFTER_FUNC_HOOK);
143 138 }
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