mirror of
https://github.com/ARM-software/workload-automation.git
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68 lines
2.5 KiB
Python
68 lines
2.5 KiB
Python
# Copyright 2014-2017 ARM Limited
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import os
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from wa import Instrument, Parameter
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from wa.framework.exception import InstrumentError
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from wa.framework.instrumentation import slow
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from wa.utils.misc import ensure_file_directory_exists as _f
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class DmesgInstrument(Instrument):
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# pylint: disable=no-member,attribute-defined-outside-init
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"""
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Collected dmesg output before and during the run.
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"""
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name = 'dmesg'
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parameters = [
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Parameter('loglevel', kind=int, allowed_values=range(8),
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description='Set loglevel for console output.')
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]
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loglevel_file = '/proc/sys/kernel/printk'
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def initialize(self, context):
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self.need_root = self.target.os == 'android'
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if self.need_root and not self.target.is_rooted:
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raise InstrumentError('Need root to collect dmesg on Android')
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def setup(self, context):
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if self.loglevel:
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self.old_loglevel = self.target.read_int(self.loglevel_file)
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self.target.write_value(self.loglevel_file, self.loglevel, verify=False)
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self.before_file = _f(os.path.join(context.output_directory, 'dmesg', 'before'))
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self.after_file = _f(os.path.join(context.output_directory, 'dmesg', 'after'))
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@slow
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def start(self, context):
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with open(self.before_file, 'w') as wfh:
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wfh.write(self.target.execute('dmesg', as_root=self.need_root))
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context.add_artifact('dmesg_before', self.before_file, kind='data')
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if self.target.is_rooted:
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self.target.execute('dmesg -c', as_root=True)
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def stop(self, context):
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with open(self.after_file, 'w') as wfh:
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wfh.write(self.target.execute('dmesg', as_root=self.need_root))
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context.add_artifact('dmesg_after', self.after_file, kind='data')
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def teardown(self, context): # pylint: disable=unused-argument
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if self.loglevel:
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self.target.write_value(self.loglevel_file, self.old_loglevel, verify=False)
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