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1569be9ba7
To be compatible with Python3 ensure that start and stop markers are encoded before writing.
95 lines
3.0 KiB
Python
95 lines
3.0 KiB
Python
# Copyright 2018 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 shutil
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from tempfile import NamedTemporaryFile
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from pexpect.exceptions import TIMEOUT
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from devlib.trace import TraceCollector
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from devlib.utils.serial_port import get_connection
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class SerialTraceCollector(TraceCollector):
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@property
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def collecting(self):
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return self._collecting
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def __init__(self, target, serial_port, baudrate, timeout=20):
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super(SerialTraceCollector, self).__init__(target)
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self.serial_port = serial_port
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self.baudrate = baudrate
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self.timeout = timeout
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self._serial_target = None
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self._conn = None
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self._tmpfile = None
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self._collecting = False
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def reset(self):
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if self._collecting:
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raise RuntimeError("reset was called whilst collecting")
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if self._tmpfile:
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self._tmpfile.close()
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self._tmpfile = None
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def start(self):
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if self._collecting:
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raise RuntimeError("start was called whilst collecting")
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self._tmpfile = NamedTemporaryFile()
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start_marker = "-------- Starting serial logging --------\n"
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self._tmpfile.write(start_marker.encode('utf-8'))
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self._serial_target, self._conn = get_connection(port=self.serial_port,
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baudrate=self.baudrate,
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timeout=self.timeout,
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logfile=self._tmpfile,
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init_dtr=0)
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self._collecting = True
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def stop(self):
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if not self._collecting:
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raise RuntimeError("stop was called whilst not collecting")
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# We expect the below to fail, but we need to get pexpect to
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# do something so that it interacts with the serial device,
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# and hence updates the logfile.
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try:
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self._serial_target.expect(".", timeout=1)
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except TIMEOUT:
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pass
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self._serial_target.close()
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del self._conn
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stop_marker = "-------- Stopping serial logging --------\n"
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self._tmpfile.write(stop_marker.encode('utf-8'))
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self._collecting = False
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def get_trace(self, outfile):
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if self._collecting:
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raise RuntimeError("get_trace was called whilst collecting")
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self._tmpfile.flush()
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shutil.copy(self._tmpfile.name, outfile)
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self._tmpfile.close()
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self._tmpfile = None
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