code_hash.py 2 KB
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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
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"""
Decorator functions for hashing schedule code

code hashing is used to check the consistence of schedule code and the parameters loaded from log
"""
import inspect
import zlib

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from tvm.te import schedule
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def attach_code_hash(s):
    """Decorator for attaching a code hash to a schedule

    Parameters
    ----------
    s: Schedule
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        tvm.te.schedule.Schedule to attach the hash to
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    """
    def decorator(func):
        def wrapper(*args, **kwargs):
            func(*args, **kwargs)
            raw_hash = zlib.crc32(''.join(inspect.getsourcelines(func)[0]).encode())
            s.code_hash = hex(raw_hash)[2:]
        return wrapper
    return decorator

def attach_code_hash_to_arg(arg_idx=1):
    """Decorator for attaching a code hash to a schedule

    Parameters
    ----------
    arg_idx: int
        index of the argument (expected to be a Schedule) to attach the code
        hash to
    """
    def decorator(func):
        def wrapper(*args, **kwargs):
            func(*args, **kwargs)
            assert isinstance(args[arg_idx], schedule.Schedule)
            raw_hash = zlib.crc32(''.join(inspect.getsourcelines(func)[0]).encode())
            args[arg_idx].code_hash = hex(raw_hash)[2:]
        return wrapper
    return decorator