.. py:module:: ethereum.homestead.vm.runtime

Ethereum Virtual Machine (EVM) Runtime Operations
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. contents:: Table of Contents
    :backlinks: none
    :local:

Introduction
------------

Runtime related operations used while executing EVM code.


.. only:: stage1

Module Contents
---------------


Functions
~~~~~~~~~

.. autoapisummary::
   :nosignatures:

   ethereum.homestead.vm.runtime.get_valid_jump_destinations



Module Details
---------------

get_valid_jump_destinations
~~~~~~~~~~~~~~~~~~~~~~~~~~~


.. function:: get_valid_jump_destinations(code: bytes) -> Set[ethereum.base_types.Uint]
   :noindexentry:

   Analyze the evm code to obtain the set of valid jump destinations.

   Valid jump destinations are defined as follows:
       * The jump destination is less than the length of the code.
       * The jump destination should have the `JUMPDEST` opcode (0x5B).
       * The jump destination shouldn't be part of the data corresponding to
         `PUSH-N` opcodes.

   Note - Jump destinations are 0-indexed.

   :param code: The EVM code which is to be executed.

   :returns: **valid_jump_destinations** -- The set of valid jump destinations in the code.
   :rtype: `Set[Uint]`




.. undocinclude:: /../src/ethereum/homestead/vm/runtime.py
   :language: python
   :pyobject: get_valid_jump_destinations