开源一个Linux进程内存内核管理模块源码

#include <linux/pid.h> pid_t pid_vnr(struct pid *pid){    return pid_nr_ns(pid, current->nsproxy->pid_ns);}EXPORT_SYMBOL_GPL(pid_vnr); struct pid *find_pid_ns(int nr, struct pid_namespace *ns);EXPORT_SYMBOL_GPL(find_pid_ns); struct pid *find_vpid(int nr){    return find_pid_ns(nr, current->nsproxy->pid_ns);}EXPORT_SYMBOL_GPL(find_vpid); struct pid *find_get_pid(int nr){    struct pid *pid;     rcu_read_lock();    pid = get_pid(find_vpid(nr));    rcu_read_unlock();     return pid;}EXPORT_SYMBOL_GPL(find_get_pid); void put_pid(struct pid *pid);EXPORT_SYMBOL_GPL(put_pid);  struct pid * –> struct task_struct *  #include <linux/pid.h> struct pid *get_task_pid(sturct task_struct *task, enum pid_type);EXPORT_SYMBOL_GPL(get_task_pid); struct task_struct *pid_task(struct pid *pid, enum pid_type);EXPORT_SYMBOL(pid_task); struct task_struct *get_pid_task(struct pid *pid, enum pid_type){    struct task_struct *result;    rcu_read_lock();    result = pid_task(pid, type);    if (result)        get_task_struct(result);    rcu_read_unlock();    return result;}EXPORT_SYMBOL(get_pid_task); #include <linux/sched.h>#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while (0)static inline void put_task_struct(struct task_struct *t){    if (atomic_dec_and_test(&t->usage))        __put_task_struct(t);} void __put_task_struct(struct task_struct *t);EXPORT_SYMBOL_GPL(__put_task_struct);

void put_pid(struct pid *pid){    struct pid_namespace *ns;     if (!pid)        return;     ns = pid->numbers[pid->level].ns;    if ((atomic_read(&pid->count) == 1) ||         atomic_dec_and_test(&pid->count)) {        kmem_cache_free(ns->pid_cachep, pid);        put_pid_ns(ns);    }}EXPORT_SYMBOL_GPL(put_pid);

struct mm_struct {    struct vm_area_struct * mmap;        /* list of VMAs */    struct rb_root mm_rb;    struct vm_area_struct * mmap_cache;    /* last find_vma result */#ifdef CONFIG_MMU    unsigned long (*get_unmapped_area) (struct file *filp,                unsigned long addr, unsigned long len,                unsigned long pgoff, unsigned long flags);    void (*unmap_area) (struct mm_struct *mm, unsigned long addr);#endif    unsigned long mmap_base;        /* base of mmap area */    unsigned long mmap_legacy_base;         /* base of mmap area in bottom-up allocations */    unsigned long task_size;        /* size of task vm space */    unsigned long cached_hole_size;     /* if non-zero, the largest hole below free_area_cache */    unsigned long free_area_cache;        /* first hole of size cached_hole_size or larger */    unsigned long highest_vm_end;        /* highest vma end address */    pgd_t * pgd;    atomic_t mm_users;            /* How many users with user space? */    atomic_t mm_count;            /* How many references to "struct mm_struct" (users count as 1) */    int map_count;                /* number of VMAs */     spinlock_t page_table_lock;        /* Protects page tables and some counters */    struct rw_semaphore mmap_sem;     struct list_head mmlist;        /* List of maybe swapped mm's.    These are globally strung                         * together off init_mm.mmlist, and are protected                         * by mmlist_lock                         */      unsigned long hiwater_rss;    /* High-watermark of RSS usage */    unsigned long hiwater_vm;    /* High-water virtual memory usage */     unsigned long total_vm;        /* Total pages mapped */    unsigned long locked_vm;    /* Pages that have PG_mlocked set */    unsigned long pinned_vm;    /* Refcount permanently increased */    unsigned long shared_vm;    /* Shared pages (files) */    unsigned long exec_vm;        /* VM_EXEC & ~VM_WRITE */    unsigned long stack_vm;        /* VM_GROWSUP/DOWN */    unsigned long def_flags;    unsigned long nr_ptes;        /* Page table pages */    unsigned long start_code, end_code, start_data, end_data;    unsigned long start_brk, brk, start_stack;    unsigned long arg_start, arg_end, env_start, env_end;     unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */