示例#1
0
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(&note_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(&note_lock);
	unlock_mmap(mm);

out:
	return size;
}
示例#2
0
void scribe_lock_mmap_write(struct mm_struct *mm)
{
	lock_mmap(mm, SCRIBE_WRITE);
}
示例#3
0
void scribe_lock_mmap_read(struct mm_struct *mm)
{
	lock_mmap(mm, SCRIBE_READ);
}