nommu-map-list-debug.patch

   1 --- fs/proc/task_nommu.c
   2 +++ fs/proc/task_nommu.c.old
   3 @@ -145,6 +145,8 @@
   4         seq_printf(m, "%*c", len, ' ');
   5  }
   6
   7 +#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s:%i: " fmt "\n", __FUNCTION__, __LINE__, ## args)
   8 +
   9  static int show_map(struct seq_file *m, void *v)
  10  {
  11         struct vm_list_struct *vml = v;
  12 @@ -157,6 +159,8 @@
  13         dev_t dev = 0;
  14         int len;
  15
  16 +DPRINTK("!!! BOOYA");
  17 +
  18         if (file) {
  19                 struct inode *inode = vma->vm_file->f_dentry->d_inode;
  20                 dev = inode->i_sb->s_dev;
  21 @@ -209,12 +213,15 @@
  22         struct mm_struct *mm;
  23         struct vm_list_struct *vml;
  24         loff_t l = *pos;
  25 +DPRINTK("!!! BOOYA l=%i", (int)l);
  26
  27         mm = get_task_mm(task);
  28         if (!mm)
  29                 return NULL;
  30
  31 +DPRINTK("!!! BOOYA down_read(sem)");
  32         down_read(&mm->mmap_sem);
  33 +DPRINTK("!!! BOOYA");
  34
  35         /*
  36          * Check the vml index is within the range and do
  37 @@ -228,38 +235,57 @@
  38         }
  39
  40         if (vml)
  41 +{
  42 +DPRINTK("!!! BOOYA <-- exit");
  43                 return vml;
  44 +}
  45
  46         /* End of vmls has been reached */
  47 +DPRINTK("!!! BOOYA up_read(sem)");
  48         up_read(&mm->mmap_sem);
  49 +DPRINTK("!!! BOOYA mmput(mm)");
  50         mmput(mm);
  51
  52 +DPRINTK("!!! BOOYA <-- exit");
  53         return NULL;
  54  }
  55  static void m_stop(struct seq_file *m, void *v)
  56  {
  57         struct task_struct *task = m->private;
  58         struct mm_struct *mm;
  59 +DPRINTK("!!! BOOYA --> enter");
  60
  61         if (!v)
  62                 return;
  63
  64         mm = get_task_mm(task);
  65         if (!mm)
  66 +{
  67 +DPRINTK("!!! BOOYA <-- exit");
  68                 return;
  69 +}
  70
  71 +DPRINTK("!!! BOOYA up_read(sem)");
  72         up_read(&mm->mmap_sem);
  73 +DPRINTK("!!! BOOYA mmput(mm)");
  74         mmput(mm);
  75 +DPRINTK("!!! BOOYA <-- exit");
  76  }
  77  static void *m_next(struct seq_file *m, void *v, loff_t *pos)
  78  {
  79         struct vm_list_struct *vml = v;
  80 +DPRINTK("!!! BOOYA");
  81
  82         (*pos)++;
  83         if (vml && vml->next)
  84 +{
  85 +DPRINTK("!!! BOOYA");
  86                 return vml->next;
  87 +}
  88
  89 +DPRINTK("!!! BOOYA");
  90         m_stop(m, vml);
  91 +DPRINTK("!!! BOOYA");
  92         return NULL;
  93  }
  94  struct seq_operations proc_pid_maps_op = {