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dfec072e VN |
1 | #ifndef LINUX_KMEMCHECK_H |
2 | #define LINUX_KMEMCHECK_H | |
3 | ||
4 | #include <linux/mm_types.h> | |
5 | #include <linux/types.h> | |
6 | ||
7 | #ifdef CONFIG_KMEMCHECK | |
8 | extern int kmemcheck_enabled; | |
9 | ||
2dff4405 | 10 | /* The slab-related functions. */ |
b1eeab67 VN |
11 | void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node); |
12 | void kmemcheck_free_shadow(struct page *page, int order); | |
2dff4405 VN |
13 | void kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object, |
14 | size_t size); | |
15 | void kmemcheck_slab_free(struct kmem_cache *s, void *object, size_t size); | |
16 | ||
b1eeab67 VN |
17 | void kmemcheck_pagealloc_alloc(struct page *p, unsigned int order, |
18 | gfp_t gfpflags); | |
19 | ||
2dff4405 VN |
20 | void kmemcheck_show_pages(struct page *p, unsigned int n); |
21 | void kmemcheck_hide_pages(struct page *p, unsigned int n); | |
22 | ||
23 | bool kmemcheck_page_is_tracked(struct page *p); | |
24 | ||
25 | void kmemcheck_mark_unallocated(void *address, unsigned int n); | |
26 | void kmemcheck_mark_uninitialized(void *address, unsigned int n); | |
27 | void kmemcheck_mark_initialized(void *address, unsigned int n); | |
28 | void kmemcheck_mark_freed(void *address, unsigned int n); | |
29 | ||
30 | void kmemcheck_mark_unallocated_pages(struct page *p, unsigned int n); | |
31 | void kmemcheck_mark_uninitialized_pages(struct page *p, unsigned int n); | |
b1eeab67 | 32 | void kmemcheck_mark_initialized_pages(struct page *p, unsigned int n); |
2dff4405 | 33 | |
dfec072e VN |
34 | int kmemcheck_show_addr(unsigned long address); |
35 | int kmemcheck_hide_addr(unsigned long address); | |
fc7d0c9f | 36 | |
8e019366 PE |
37 | bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size); |
38 | ||
e992cd9b VN |
39 | /* |
40 | * Bitfield annotations | |
41 | * | |
42 | * How to use: If you have a struct using bitfields, for example | |
43 | * | |
44 | * struct a { | |
45 | * int x:8, y:8; | |
46 | * }; | |
47 | * | |
48 | * then this should be rewritten as | |
49 | * | |
50 | * struct a { | |
51 | * kmemcheck_bitfield_begin(flags); | |
52 | * int x:8, y:8; | |
53 | * kmemcheck_bitfield_end(flags); | |
54 | * }; | |
55 | * | |
56 | * Now the "flags_begin" and "flags_end" members may be used to refer to the | |
57 | * beginning and end, respectively, of the bitfield (and things like | |
58 | * &x.flags_begin is allowed). As soon as the struct is allocated, the bit- | |
59 | * fields should be annotated: | |
60 | * | |
61 | * struct a *a = kmalloc(sizeof(struct a), GFP_KERNEL); | |
62 | * kmemcheck_annotate_bitfield(a, flags); | |
63 | */ | |
64 | #define kmemcheck_bitfield_begin(name) \ | |
65 | int name##_begin[0]; | |
66 | ||
67 | #define kmemcheck_bitfield_end(name) \ | |
68 | int name##_end[0]; | |
69 | ||
70 | #define kmemcheck_annotate_bitfield(ptr, name) \ | |
71 | do { \ | |
72 | int _n; \ | |
73 | \ | |
74 | if (!ptr) \ | |
75 | break; \ | |
76 | \ | |
77 | _n = (long) &((ptr)->name##_end) \ | |
78 | - (long) &((ptr)->name##_begin); \ | |
1765e3a4 | 79 | BUILD_BUG_ON(_n < 0); \ |
e992cd9b VN |
80 | \ |
81 | kmemcheck_mark_initialized(&((ptr)->name##_begin), _n); \ | |
82 | } while (0) | |
83 | ||
84 | #define kmemcheck_annotate_variable(var) \ | |
85 | do { \ | |
86 | kmemcheck_mark_initialized(&(var), sizeof(var)); \ | |
87 | } while (0) \ | |
88 | ||
dfec072e VN |
89 | #else |
90 | #define kmemcheck_enabled 0 | |
91 | ||
2dff4405 | 92 | static inline void |
b1eeab67 | 93 | kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node) |
2dff4405 VN |
94 | { |
95 | } | |
96 | ||
97 | static inline void | |
b1eeab67 | 98 | kmemcheck_free_shadow(struct page *page, int order) |
2dff4405 VN |
99 | { |
100 | } | |
101 | ||
102 | static inline void | |
103 | kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object, | |
104 | size_t size) | |
105 | { | |
106 | } | |
107 | ||
108 | static inline void kmemcheck_slab_free(struct kmem_cache *s, void *object, | |
109 | size_t size) | |
110 | { | |
111 | } | |
112 | ||
b1eeab67 VN |
113 | static inline void kmemcheck_pagealloc_alloc(struct page *p, |
114 | unsigned int order, gfp_t gfpflags) | |
115 | { | |
116 | } | |
117 | ||
2dff4405 VN |
118 | static inline bool kmemcheck_page_is_tracked(struct page *p) |
119 | { | |
120 | return false; | |
121 | } | |
d7002857 VN |
122 | |
123 | static inline void kmemcheck_mark_unallocated(void *address, unsigned int n) | |
124 | { | |
125 | } | |
126 | ||
127 | static inline void kmemcheck_mark_uninitialized(void *address, unsigned int n) | |
128 | { | |
129 | } | |
130 | ||
131 | static inline void kmemcheck_mark_initialized(void *address, unsigned int n) | |
132 | { | |
133 | } | |
134 | ||
135 | static inline void kmemcheck_mark_freed(void *address, unsigned int n) | |
136 | { | |
137 | } | |
b1eeab67 VN |
138 | |
139 | static inline void kmemcheck_mark_unallocated_pages(struct page *p, | |
140 | unsigned int n) | |
141 | { | |
142 | } | |
143 | ||
144 | static inline void kmemcheck_mark_uninitialized_pages(struct page *p, | |
145 | unsigned int n) | |
146 | { | |
147 | } | |
148 | ||
149 | static inline void kmemcheck_mark_initialized_pages(struct page *p, | |
150 | unsigned int n) | |
151 | { | |
152 | } | |
153 | ||
8e019366 PE |
154 | static inline bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size) |
155 | { | |
156 | return true; | |
157 | } | |
158 | ||
e992cd9b VN |
159 | #define kmemcheck_bitfield_begin(name) |
160 | #define kmemcheck_bitfield_end(name) | |
161 | #define kmemcheck_annotate_bitfield(ptr, name) \ | |
162 | do { \ | |
163 | } while (0) | |
fc7d0c9f | 164 | |
e992cd9b VN |
165 | #define kmemcheck_annotate_variable(var) \ |
166 | do { \ | |
fc7d0c9f VN |
167 | } while (0) |
168 | ||
e992cd9b | 169 | #endif /* CONFIG_KMEMCHECK */ |
fc7d0c9f | 170 | |
dfec072e | 171 | #endif /* LINUX_KMEMCHECK_H */ |