kmemleak内存泄漏检测源码分析-1

数据结构

kmemleak_object

struct kmemleak_object描述一段通过memblock_alloc、kmalloc、vmalloc、kmem_cache_alloc等函数分配的内存块。此内存块会加入到红黑树object_tree_root和双向链表object_list中。

//Kmemleak.c

/* search tree for object boundaries */
static struct rb_root object_tree_root = RB_ROOT;

//Kmemleak.c

struct kmemleak_object {
    spinlock_t lock;
    unsigned long flags;        /* object status flags */
    struct list_head object_list;
    struct list_head gray_list;
    struct rb_node rb_node;
    struct rcu_head rcu;        /* object_list lockless traversal */
    /* object usage count; object freed when use_count == 0 */
    atomic_t use_count;
    unsigned long pointer;
    size_t size;
    /* minimum number of a pointers found before it is considered leak */
    int min_count;
    /* the total number of pointers