Пример #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;
}
Пример #2
0
int oprof_hash_map_mmap(struct file * file, struct vm_area_struct * vma)
{
	ulong start = (ulong)vma->vm_start;
	ulong page, pos;
	ulong size = (ulong)(vma->vm_end-vma->vm_start);

	if (size > PAGE_ALIGN(OP_HASH_MAP_SIZE) || (vma->vm_flags & VM_WRITE) || GET_VM_OFFSET(vma))
		return -EINVAL;

	pos = (ulong)hash_map;
	while (size > 0) {
		page = kvirt_to_pa(pos);
		if (remap_page_range(start, page, PAGE_SIZE, PAGE_SHARED))
			return -EAGAIN;
		start += PAGE_SIZE;
		pos += PAGE_SIZE;
		size -= PAGE_SIZE;
	}
	return 0;
}