166 lines
4.3 KiB
C
166 lines
4.3 KiB
C
#ifndef LINUX_KMEMCHECK_H
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#define LINUX_KMEMCHECK_H
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#include <linux/mm_types.h>
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#include <linux/types.h>
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#ifdef CONFIG_KMEMCHECK
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extern int kmemcheck_enabled;
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/* The slab-related functions. */
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void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node);
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void kmemcheck_free_shadow(struct page *page, int order);
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void kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object,
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size_t size);
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void kmemcheck_slab_free(struct kmem_cache *s, void *object, size_t size);
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void kmemcheck_pagealloc_alloc(struct page *p, unsigned int order,
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gfp_t gfpflags);
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void kmemcheck_show_pages(struct page *p, unsigned int n);
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void kmemcheck_hide_pages(struct page *p, unsigned int n);
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bool kmemcheck_page_is_tracked(struct page *p);
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void kmemcheck_mark_unallocated(void *address, unsigned int n);
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void kmemcheck_mark_uninitialized(void *address, unsigned int n);
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void kmemcheck_mark_initialized(void *address, unsigned int n);
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void kmemcheck_mark_freed(void *address, unsigned int n);
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void kmemcheck_mark_unallocated_pages(struct page *p, unsigned int n);
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void kmemcheck_mark_uninitialized_pages(struct page *p, unsigned int n);
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void kmemcheck_mark_initialized_pages(struct page *p, unsigned int n);
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int kmemcheck_show_addr(unsigned long address);
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int kmemcheck_hide_addr(unsigned long address);
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bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size);
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#else
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#define kmemcheck_enabled 0
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static inline void
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kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node)
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{
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}
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static inline void
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kmemcheck_free_shadow(struct page *page, int order)
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{
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}
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static inline void
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kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object,
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size_t size)
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{
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}
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static inline void kmemcheck_slab_free(struct kmem_cache *s, void *object,
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size_t size)
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{
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}
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static inline void kmemcheck_pagealloc_alloc(struct page *p,
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unsigned int order, gfp_t gfpflags)
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{
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}
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static inline bool kmemcheck_page_is_tracked(struct page *p)
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{
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return false;
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}
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static inline void kmemcheck_mark_unallocated(void *address, unsigned int n)
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{
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}
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static inline void kmemcheck_mark_uninitialized(void *address, unsigned int n)
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{
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}
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static inline void kmemcheck_mark_initialized(void *address, unsigned int n)
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{
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}
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static inline void kmemcheck_mark_freed(void *address, unsigned int n)
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{
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}
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static inline void kmemcheck_mark_unallocated_pages(struct page *p,
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unsigned int n)
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{
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}
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static inline void kmemcheck_mark_uninitialized_pages(struct page *p,
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unsigned int n)
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{
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}
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static inline void kmemcheck_mark_initialized_pages(struct page *p,
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unsigned int n)
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{
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}
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static inline bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size)
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{
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return true;
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}
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#endif /* CONFIG_KMEMCHECK */
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/*
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* Bitfield annotations
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*
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* How to use: If you have a struct using bitfields, for example
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*
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* struct a {
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* int x:8, y:8;
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* };
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*
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* then this should be rewritten as
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*
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* struct a {
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* kmemcheck_bitfield_begin(flags);
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* int x:8, y:8;
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* kmemcheck_bitfield_end(flags);
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* };
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*
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* Now the "flags_begin" and "flags_end" members may be used to refer to the
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* beginning and end, respectively, of the bitfield (and things like
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* &x.flags_begin is allowed). As soon as the struct is allocated, the bit-
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* fields should be annotated:
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*
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* struct a *a = kmalloc(sizeof(struct a), GFP_KERNEL);
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* kmemcheck_annotate_bitfield(a, flags);
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*
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* Note: We provide the same definitions for both kmemcheck and non-
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* kmemcheck kernels. This makes it harder to introduce accidental errors. It
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* is also allowed to pass NULL pointers to kmemcheck_annotate_bitfield().
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*/
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#define kmemcheck_bitfield_begin(name) \
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int name##_begin[0];
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#define kmemcheck_bitfield_end(name) \
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int name##_end[0];
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#define kmemcheck_annotate_bitfield(ptr, name) \
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do { \
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int _n; \
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\
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if (!ptr) \
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break; \
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\
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_n = (long) &((ptr)->name##_end) \
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- (long) &((ptr)->name##_begin); \
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MAYBE_BUILD_BUG_ON(_n < 0); \
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\
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kmemcheck_mark_initialized(&((ptr)->name##_begin), _n); \
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} while (0)
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#define kmemcheck_annotate_variable(var) \
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do { \
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kmemcheck_mark_initialized(&(var), sizeof(var)); \
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} while (0) \
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#endif /* LINUX_KMEMCHECK_H */
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