b1eeab6768
This adds support for tracking the initializedness of memory that was allocated with the page allocator. Highmem requests are not tracked. Cc: Dave Hansen <dave@linux.vnet.ibm.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> [build fix for !CONFIG_KMEMCHECK] Signed-off-by: Ingo Molnar <mingo@elte.hu> [rebased for mainline inclusion] Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
104 lines
2.6 KiB
C
104 lines
2.6 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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#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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#endif /* CONFIG_KMEMCHECK */
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#endif /* LINUX_KMEMCHECK_H */
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