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