static int oprof_output_maps(struct task_struct * task)
{
int size=0;
struct mm_struct * mm;
struct vm_area_struct * map;
/* we don't need to worry about mm_users here, since there is at
least one user (current), and if there's other code using this
mm, then mm_users must be at least 2; we should never have to
mmput() here. */
if (!(mm = task->mm))
goto out;
lock_mmap(mm);
spin_lock(¬e_lock);
/* We need two pass, daemon assume than the first mmap notification
* is for the executable but some process doesn't follow this model.
*/
for (map = mm->mmap; map; map = map->vm_next) {
if (!(map->vm_flags & VM_EXEC) || !map->vm_file)
continue;
if (!(map->vm_flags & VM_EXECUTABLE))
continue;
oprof_output_map(map->vm_start, map->vm_end-map->vm_start,
GET_VM_OFFSET(map), map->vm_file, 1);
}
for (map = mm->mmap; map; map = map->vm_next) {
if (!(map->vm_flags & VM_EXEC) || !map->vm_file)
continue;
if (map->vm_flags & VM_EXECUTABLE)
continue;
oprof_output_map(map->vm_start, map->vm_end-map->vm_start,
GET_VM_OFFSET(map), map->vm_file, 0);
}
spin_unlock(¬e_lock);
unlock_mmap(mm);
out:
return size;
}
void scribe_lock_mmap_write(struct mm_struct *mm)
{
lock_mmap(mm, SCRIBE_WRITE);
}
void scribe_lock_mmap_read(struct mm_struct *mm)
{
lock_mmap(mm, SCRIBE_READ);
}