static void vm_map_simplify_range()

in osfmk/vm/vm_map.c [172:380]

• 178 lines of code
• 1 McCabe index (conditional complexity)

static void vm_map_simplify_range(
	vm_map_t        map,
	vm_map_offset_t start,
	vm_map_offset_t end);   /* forward */

static boolean_t        vm_map_range_check(
	vm_map_t        map,
	vm_map_offset_t start,
	vm_map_offset_t end,
	vm_map_entry_t  *entry);

static vm_map_entry_t   _vm_map_entry_create(
	struct vm_map_header    *map_header, boolean_t map_locked);

static void             _vm_map_entry_dispose(
	struct vm_map_header    *map_header,
	vm_map_entry_t          entry);

static void             vm_map_pmap_enter(
	vm_map_t                map,
	vm_map_offset_t         addr,
	vm_map_offset_t         end_addr,
	vm_object_t             object,
	vm_object_offset_t      offset,
	vm_prot_t               protection);

static void             _vm_map_clip_end(
	struct vm_map_header    *map_header,
	vm_map_entry_t          entry,
	vm_map_offset_t         end);

static void             _vm_map_clip_start(
	struct vm_map_header    *map_header,
	vm_map_entry_t          entry,
	vm_map_offset_t         start);

static void             vm_map_entry_delete(
	vm_map_t        map,
	vm_map_entry_t  entry);

static kern_return_t    vm_map_delete(
	vm_map_t        map,
	vm_map_offset_t start,
	vm_map_offset_t end,
	int             flags,
	vm_map_t        zap_map);

static void             vm_map_copy_insert(
	vm_map_t        map,
	vm_map_entry_t  after_where,
	vm_map_copy_t   copy);

static kern_return_t    vm_map_copy_overwrite_unaligned(
	vm_map_t        dst_map,
	vm_map_entry_t  entry,
	vm_map_copy_t   copy,
	vm_map_address_t start,
	boolean_t       discard_on_success);

static kern_return_t    vm_map_copy_overwrite_aligned(
	vm_map_t        dst_map,
	vm_map_entry_t  tmp_entry,
	vm_map_copy_t   copy,
	vm_map_offset_t start,
	pmap_t          pmap);

static kern_return_t    vm_map_copyin_kernel_buffer(
	vm_map_t        src_map,
	vm_map_address_t src_addr,
	vm_map_size_t   len,
	boolean_t       src_destroy,
	vm_map_copy_t   *copy_result);  /* OUT */

static kern_return_t    vm_map_copyout_kernel_buffer(
	vm_map_t        map,
	vm_map_address_t *addr, /* IN/OUT */
	vm_map_copy_t   copy,
	vm_map_size_t   copy_size,
	boolean_t       overwrite,
	boolean_t       consume_on_success);

static void             vm_map_fork_share(
	vm_map_t        old_map,
	vm_map_entry_t  old_entry,
	vm_map_t        new_map);

static boolean_t        vm_map_fork_copy(
	vm_map_t        old_map,
	vm_map_entry_t  *old_entry_p,
	vm_map_t        new_map,
	int             vm_map_copyin_flags);

static kern_return_t    vm_map_wire_nested(
	vm_map_t                   map,
	vm_map_offset_t            start,
	vm_map_offset_t            end,
	vm_prot_t                  caller_prot,
	vm_tag_t                   tag,
	boolean_t                  user_wire,
	pmap_t                     map_pmap,
	vm_map_offset_t            pmap_addr,
	ppnum_t                    *physpage_p);

static kern_return_t    vm_map_unwire_nested(
	vm_map_t                   map,
	vm_map_offset_t            start,
	vm_map_offset_t            end,
	boolean_t                  user_wire,
	pmap_t                     map_pmap,
	vm_map_offset_t            pmap_addr);

static kern_return_t    vm_map_overwrite_submap_recurse(
	vm_map_t                   dst_map,
	vm_map_offset_t            dst_addr,
	vm_map_size_t              dst_size);

static kern_return_t    vm_map_copy_overwrite_nested(
	vm_map_t                   dst_map,
	vm_map_offset_t            dst_addr,
	vm_map_copy_t              copy,
	boolean_t                  interruptible,
	pmap_t                     pmap,
	boolean_t                  discard_on_success);

static kern_return_t    vm_map_remap_extract(
	vm_map_t                map,
	vm_map_offset_t         addr,
	vm_map_size_t           size,
	boolean_t               copy,
	struct vm_map_header    *map_header,
	vm_prot_t               *cur_protection,
	vm_prot_t               *max_protection,
	vm_inherit_t            inheritance,
	vm_map_kernel_flags_t   vmk_flags);

static kern_return_t    vm_map_remap_range_allocate(
	vm_map_t                map,
	vm_map_address_t        *address,
	vm_map_size_t           size,
	vm_map_offset_t         mask,
	int                     flags,
	vm_map_kernel_flags_t   vmk_flags,
	vm_tag_t                tag,
	vm_map_entry_t          *map_entry);

static void             vm_map_region_look_for_page(
	vm_map_t                   map,
	vm_map_offset_t            va,
	vm_object_t                object,
	vm_object_offset_t         offset,
	int                        max_refcnt,
	unsigned short             depth,
	vm_region_extended_info_t  extended,
	mach_msg_type_number_t count);

static int              vm_map_region_count_obj_refs(
	vm_map_entry_t             entry,
	vm_object_t                object);


static kern_return_t    vm_map_willneed(
	vm_map_t        map,
	vm_map_offset_t start,
	vm_map_offset_t end);

static kern_return_t    vm_map_reuse_pages(
	vm_map_t        map,
	vm_map_offset_t start,
	vm_map_offset_t end);

static kern_return_t    vm_map_reusable_pages(
	vm_map_t        map,
	vm_map_offset_t start,
	vm_map_offset_t end);

static kern_return_t    vm_map_can_reuse(
	vm_map_t        map,
	vm_map_offset_t start,
	vm_map_offset_t end);

#if MACH_ASSERT
static kern_return_t    vm_map_pageout(
	vm_map_t        map,
	vm_map_offset_t start,
	vm_map_offset_t end);
#endif /* MACH_ASSERT */

kern_return_t vm_map_corpse_footprint_collect(
	vm_map_t        old_map,
	vm_map_entry_t  old_entry,
	vm_map_t        new_map);
void vm_map_corpse_footprint_collect_done(
	vm_map_t        new_map);
void vm_map_corpse_footprint_destroy(
	vm_map_t        map);
kern_return_t vm_map_corpse_footprint_query_page_info(
	vm_map_t        map,
	vm_map_offset_t va,
	int             *disposition_p);
void vm_map_footprint_query_page_info(
	vm_map_t        map,
	vm_map_entry_t  map_entry,
	vm_map_offset_t curr_s_offset,
	int             *disposition_p);

static const struct vm_map_entry vm_map_entry_template = {
	.behavior = VM_BEHAVIOR_DEFAULT,
	.inheritance = VM_INHERIT_DEFAULT,
};