398 lines
9.2 KiB
C
398 lines
9.2 KiB
C
/******************************************************************************/
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#ifdef JEMALLOC_H_TYPES
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typedef struct extent_s extent_t;
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#define EXTENT_HOOKS_INITIALIZER { \
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NULL, \
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NULL, \
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NULL, \
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NULL, \
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NULL, \
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NULL, \
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NULL \
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}
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#endif /* JEMALLOC_H_TYPES */
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/******************************************************************************/
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#ifdef JEMALLOC_H_STRUCTS
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/* Extent (span of pages). Use accessor functions for e_* fields. */
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struct extent_s {
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/* Arena from which this extent came, if any. */
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arena_t *e_arena;
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/* Pointer to the extent that this structure is responsible for. */
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void *e_addr;
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/* Extent size. */
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size_t e_size;
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/*
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* Usable size, typically smaller than extent size due to large_pad or
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* promotion of sampled small regions.
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*/
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size_t e_usize;
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/* True if extent is active (in use). */
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bool e_active;
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/*
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* The zeroed flag is used by chunk recycling code to track whether
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* memory is zero-filled.
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*/
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bool e_zeroed;
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/*
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* True if physical memory is committed to the extent, whether
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* explicitly or implicitly as on a system that overcommits and
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* satisfies physical memory needs on demand via soft page faults.
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*/
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bool e_committed;
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/*
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* The slab flag indicates whether the extent is used for a slab of
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* small regions. This helps differentiate small size classes, and it
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* indicates whether interior pointers can be looked up via iealloc().
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*/
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bool e_slab;
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union {
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/* Small region slab metadata. */
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arena_slab_data_t e_slab_data;
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/* Profile counters, used for large objects. */
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union {
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void *e_prof_tctx_pun;
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prof_tctx_t *e_prof_tctx;
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};
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};
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/*
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* Linkage for arena's extents_dirty and arena_bin_t's slabs_full rings.
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*/
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qr(extent_t) qr_link;
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union {
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/* Linkage for per size class address-ordered heaps. */
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phn(extent_t) ph_link;
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/* Linkage for arena's large and extent_cache lists. */
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ql_elm(extent_t) ql_link;
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};
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};
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typedef ph(extent_t) extent_heap_t;
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#endif /* JEMALLOC_H_STRUCTS */
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/******************************************************************************/
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#ifdef JEMALLOC_H_EXTERNS
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extern rtree_t extents_rtree;
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extent_t *extent_alloc(tsdn_t *tsdn, arena_t *arena);
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void extent_dalloc(tsdn_t *tsdn, arena_t *arena, extent_t *extent);
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#ifdef JEMALLOC_JET
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typedef size_t (extent_size_quantize_t)(size_t);
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extern extent_size_quantize_t *extent_size_quantize_floor;
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extern extent_size_quantize_t *extent_size_quantize_ceil;
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#else
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size_t extent_size_quantize_floor(size_t size);
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size_t extent_size_quantize_ceil(size_t size);
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#endif
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ph_proto(, extent_heap_, extent_heap_t, extent_t)
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bool extent_boot(void);
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#endif /* JEMALLOC_H_EXTERNS */
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/******************************************************************************/
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#ifdef JEMALLOC_H_INLINES
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#ifndef JEMALLOC_ENABLE_INLINE
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extent_t *extent_lookup(tsdn_t *tsdn, const void *chunk, bool dependent);
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arena_t *extent_arena_get(const extent_t *extent);
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void *extent_base_get(const extent_t *extent);
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void *extent_addr_get(const extent_t *extent);
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size_t extent_size_get(const extent_t *extent);
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size_t extent_usize_get(const extent_t *extent);
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void *extent_before_get(const extent_t *extent);
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void *extent_last_get(const extent_t *extent);
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void *extent_past_get(const extent_t *extent);
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bool extent_active_get(const extent_t *extent);
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bool extent_retained_get(const extent_t *extent);
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bool extent_zeroed_get(const extent_t *extent);
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bool extent_committed_get(const extent_t *extent);
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bool extent_slab_get(const extent_t *extent);
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arena_slab_data_t *extent_slab_data_get(extent_t *extent);
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const arena_slab_data_t *extent_slab_data_get_const(const extent_t *extent);
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prof_tctx_t *extent_prof_tctx_get(const extent_t *extent);
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void extent_arena_set(extent_t *extent, arena_t *arena);
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void extent_addr_set(extent_t *extent, void *addr);
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void extent_addr_randomize(tsdn_t *tsdn, extent_t *extent, size_t alignment);
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void extent_size_set(extent_t *extent, size_t size);
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void extent_usize_set(extent_t *extent, size_t usize);
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void extent_active_set(extent_t *extent, bool active);
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void extent_zeroed_set(extent_t *extent, bool zeroed);
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void extent_committed_set(extent_t *extent, bool committed);
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void extent_slab_set(extent_t *extent, bool slab);
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void extent_prof_tctx_set(extent_t *extent, prof_tctx_t *tctx);
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void extent_init(extent_t *extent, arena_t *arena, void *addr,
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size_t size, size_t usize, bool active, bool zeroed, bool committed,
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bool slab);
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void extent_ring_insert(extent_t *sentinel, extent_t *extent);
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void extent_ring_remove(extent_t *extent);
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#endif
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#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_EXTENT_C_))
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JEMALLOC_INLINE extent_t *
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extent_lookup(tsdn_t *tsdn, const void *ptr, bool dependent)
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{
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return (rtree_read(tsdn, &extents_rtree, (uintptr_t)ptr, dependent));
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}
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JEMALLOC_INLINE arena_t *
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extent_arena_get(const extent_t *extent)
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{
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return (extent->e_arena);
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}
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JEMALLOC_INLINE void *
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extent_base_get(const extent_t *extent)
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{
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assert(extent->e_addr == PAGE_ADDR2BASE(extent->e_addr) ||
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!extent->e_slab);
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return (PAGE_ADDR2BASE(extent->e_addr));
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}
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JEMALLOC_INLINE void *
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extent_addr_get(const extent_t *extent)
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{
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assert(extent->e_addr == PAGE_ADDR2BASE(extent->e_addr) ||
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!extent->e_slab);
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return (extent->e_addr);
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}
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JEMALLOC_INLINE size_t
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extent_size_get(const extent_t *extent)
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{
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return (extent->e_size);
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}
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JEMALLOC_INLINE size_t
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extent_usize_get(const extent_t *extent)
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{
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assert(!extent->e_slab);
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return (extent->e_usize);
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}
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JEMALLOC_INLINE void *
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extent_before_get(const extent_t *extent)
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{
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return ((void *)(uintptr_t)extent->e_addr - PAGE);
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}
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JEMALLOC_INLINE void *
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extent_last_get(const extent_t *extent)
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{
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return ((void *)(uintptr_t)extent->e_addr + extent_size_get(extent) -
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PAGE);
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}
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JEMALLOC_INLINE void *
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extent_past_get(const extent_t *extent)
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{
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return ((void *)(uintptr_t)extent->e_addr + extent_size_get(extent));
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}
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JEMALLOC_INLINE bool
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extent_active_get(const extent_t *extent)
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{
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return (extent->e_active);
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}
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JEMALLOC_INLINE bool
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extent_retained_get(const extent_t *extent)
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{
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return (qr_next(extent, qr_link) == extent);
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}
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JEMALLOC_INLINE bool
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extent_zeroed_get(const extent_t *extent)
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{
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return (extent->e_zeroed);
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}
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JEMALLOC_INLINE bool
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extent_committed_get(const extent_t *extent)
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{
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return (extent->e_committed);
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}
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JEMALLOC_INLINE bool
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extent_slab_get(const extent_t *extent)
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{
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return (extent->e_slab);
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}
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JEMALLOC_INLINE arena_slab_data_t *
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extent_slab_data_get(extent_t *extent)
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{
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assert(extent->e_slab);
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return (&extent->e_slab_data);
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}
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JEMALLOC_INLINE const arena_slab_data_t *
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extent_slab_data_get_const(const extent_t *extent)
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{
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assert(extent->e_slab);
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return (&extent->e_slab_data);
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}
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JEMALLOC_INLINE prof_tctx_t *
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extent_prof_tctx_get(const extent_t *extent)
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{
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return ((prof_tctx_t *)atomic_read_p(
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&((extent_t *)extent)->e_prof_tctx_pun));
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}
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JEMALLOC_INLINE void
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extent_arena_set(extent_t *extent, arena_t *arena)
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{
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extent->e_arena = arena;
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}
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JEMALLOC_INLINE void
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extent_addr_set(extent_t *extent, void *addr)
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{
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extent->e_addr = addr;
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}
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JEMALLOC_INLINE void
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extent_addr_randomize(tsdn_t *tsdn, extent_t *extent, size_t alignment)
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{
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assert(extent_base_get(extent) == extent_addr_get(extent));
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if (alignment < PAGE) {
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unsigned lg_range = LG_PAGE -
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lg_floor(CACHELINE_CEILING(alignment));
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uint64_t r =
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prng_lg_range(&extent_arena_get(extent)->offset_state,
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lg_range, true);
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uintptr_t random_offset = ((uintptr_t)r) << (LG_PAGE -
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lg_range);
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extent->e_addr = (void *)((uintptr_t)extent->e_addr +
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random_offset);
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assert(ALIGNMENT_ADDR2BASE(extent->e_addr, alignment) ==
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extent->e_addr);
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}
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}
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JEMALLOC_INLINE void
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extent_size_set(extent_t *extent, size_t size)
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{
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extent->e_size = size;
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}
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JEMALLOC_INLINE void
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extent_usize_set(extent_t *extent, size_t usize)
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{
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extent->e_usize = usize;
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}
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JEMALLOC_INLINE void
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extent_active_set(extent_t *extent, bool active)
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{
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extent->e_active = active;
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}
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JEMALLOC_INLINE void
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extent_zeroed_set(extent_t *extent, bool zeroed)
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{
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extent->e_zeroed = zeroed;
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}
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JEMALLOC_INLINE void
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extent_committed_set(extent_t *extent, bool committed)
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{
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extent->e_committed = committed;
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}
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JEMALLOC_INLINE void
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extent_slab_set(extent_t *extent, bool slab)
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{
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extent->e_slab = slab;
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}
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JEMALLOC_INLINE void
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extent_prof_tctx_set(extent_t *extent, prof_tctx_t *tctx)
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{
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atomic_write_p(&extent->e_prof_tctx_pun, tctx);
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}
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JEMALLOC_INLINE void
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extent_init(extent_t *extent, arena_t *arena, void *addr, size_t size,
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size_t usize, bool active, bool zeroed, bool committed, bool slab)
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{
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assert(addr == PAGE_ADDR2BASE(addr) || !slab);
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extent_arena_set(extent, arena);
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extent_addr_set(extent, addr);
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extent_size_set(extent, size);
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extent_usize_set(extent, usize);
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extent_active_set(extent, active);
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extent_zeroed_set(extent, zeroed);
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extent_committed_set(extent, committed);
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extent_slab_set(extent, slab);
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if (config_prof)
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extent_prof_tctx_set(extent, NULL);
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qr_new(extent, qr_link);
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}
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JEMALLOC_INLINE void
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extent_ring_insert(extent_t *sentinel, extent_t *extent)
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{
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qr_meld(sentinel, extent, qr_link);
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}
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JEMALLOC_INLINE void
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extent_ring_remove(extent_t *extent)
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{
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qr_remove(extent, qr_link);
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}
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#endif
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#endif /* JEMALLOC_H_INLINES */
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/******************************************************************************/
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