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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 | ||
dfec072e VN |
39 | #else |
40 | #define kmemcheck_enabled 0 | |
41 | ||
2dff4405 | 42 | static inline void |
b1eeab67 | 43 | kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node) |
2dff4405 VN |
44 | { |
45 | } | |
46 | ||
47 | static inline void | |
b1eeab67 | 48 | kmemcheck_free_shadow(struct page *page, int order) |
2dff4405 VN |
49 | { |
50 | } | |
51 | ||
52 | static inline void | |
53 | kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object, | |
54 | size_t size) | |
55 | { | |
56 | } | |
57 | ||
58 | static inline void kmemcheck_slab_free(struct kmem_cache *s, void *object, | |
59 | size_t size) | |
60 | { | |
61 | } | |
62 | ||
b1eeab67 VN |
63 | static inline void kmemcheck_pagealloc_alloc(struct page *p, |
64 | unsigned int order, gfp_t gfpflags) | |
65 | { | |
66 | } | |
67 | ||
2dff4405 VN |
68 | static inline bool kmemcheck_page_is_tracked(struct page *p) |
69 | { | |
70 | return false; | |
71 | } | |
d7002857 VN |
72 | |
73 | static inline void kmemcheck_mark_unallocated(void *address, unsigned int n) | |
74 | { | |
75 | } | |
76 | ||
77 | static inline void kmemcheck_mark_uninitialized(void *address, unsigned int n) | |
78 | { | |
79 | } | |
80 | ||
81 | static inline void kmemcheck_mark_initialized(void *address, unsigned int n) | |
82 | { | |
83 | } | |
84 | ||
85 | static inline void kmemcheck_mark_freed(void *address, unsigned int n) | |
86 | { | |
87 | } | |
b1eeab67 VN |
88 | |
89 | static inline void kmemcheck_mark_unallocated_pages(struct page *p, | |
90 | unsigned int n) | |
91 | { | |
92 | } | |
93 | ||
94 | static inline void kmemcheck_mark_uninitialized_pages(struct page *p, | |
95 | unsigned int n) | |
96 | { | |
97 | } | |
98 | ||
99 | static inline void kmemcheck_mark_initialized_pages(struct page *p, | |
100 | unsigned int n) | |
101 | { | |
102 | } | |
103 | ||
8e019366 PE |
104 | static inline bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size) |
105 | { | |
106 | return true; | |
107 | } | |
108 | ||
dfec072e VN |
109 | #endif /* CONFIG_KMEMCHECK */ |
110 | ||
fc7d0c9f VN |
111 | /* |
112 | * Bitfield annotations | |
113 | * | |
114 | * How to use: If you have a struct using bitfields, for example | |
115 | * | |
116 | * struct a { | |
117 | * int x:8, y:8; | |
118 | * }; | |
119 | * | |
120 | * then this should be rewritten as | |
121 | * | |
122 | * struct a { | |
123 | * kmemcheck_bitfield_begin(flags); | |
124 | * int x:8, y:8; | |
125 | * kmemcheck_bitfield_end(flags); | |
126 | * }; | |
127 | * | |
128 | * Now the "flags_begin" and "flags_end" members may be used to refer to the | |
129 | * beginning and end, respectively, of the bitfield (and things like | |
130 | * &x.flags_begin is allowed). As soon as the struct is allocated, the bit- | |
131 | * fields should be annotated: | |
132 | * | |
133 | * struct a *a = kmalloc(sizeof(struct a), GFP_KERNEL); | |
134 | * kmemcheck_annotate_bitfield(a, flags); | |
135 | * | |
136 | * Note: We provide the same definitions for both kmemcheck and non- | |
137 | * kmemcheck kernels. This makes it harder to introduce accidental errors. It | |
138 | * is also allowed to pass NULL pointers to kmemcheck_annotate_bitfield(). | |
139 | */ | |
140 | #define kmemcheck_bitfield_begin(name) \ | |
141 | int name##_begin[0]; | |
142 | ||
143 | #define kmemcheck_bitfield_end(name) \ | |
144 | int name##_end[0]; | |
145 | ||
146 | #define kmemcheck_annotate_bitfield(ptr, name) \ | |
181f7c5d | 147 | do { \ |
fa081b00 AM |
148 | int _n; \ |
149 | \ | |
181f7c5d JB |
150 | if (!ptr) \ |
151 | break; \ | |
152 | \ | |
fa081b00 | 153 | _n = (long) &((ptr)->name##_end) \ |
fc7d0c9f | 154 | - (long) &((ptr)->name##_begin); \ |
8c87df45 | 155 | MAYBE_BUILD_BUG_ON(_n < 0); \ |
fc7d0c9f VN |
156 | \ |
157 | kmemcheck_mark_initialized(&((ptr)->name##_begin), _n); \ | |
158 | } while (0) | |
159 | ||
160 | #define kmemcheck_annotate_variable(var) \ | |
161 | do { \ | |
162 | kmemcheck_mark_initialized(&(var), sizeof(var)); \ | |
163 | } while (0) \ | |
164 | ||
dfec072e | 165 | #endif /* LINUX_KMEMCHECK_H */ |