1485ecd28e
Now the dmesg output log in correct time order, from oldest to latest. The NULL strings are also stripped, if the buffer is never get fully filled. Signed-off-by: xuxingliang <xuxingliang@xiaomi.com>
71 lines
2.5 KiB
Python
71 lines
2.5 KiB
Python
############################################################################
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# tools/gdb/nuttxgdb/dmesg.py
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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import gdb
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from . import utils
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CONFIG_RAMLOG_SYSLOG = utils.get_symbol_value("CONFIG_RAMLOG_SYSLOG")
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class Dmesg(gdb.Command):
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def __init__(self):
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if CONFIG_RAMLOG_SYSLOG:
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super().__init__("dmesg", gdb.COMMAND_USER)
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def _get_buf(self):
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sysdev = utils.gdb_eval_or_none("g_sysdev")
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if not sysdev:
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gdb.write("RAM log not available.\n")
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return None
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rl_header = sysdev["rl_header"]
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rl_bufsize = sysdev["rl_bufsize"]
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offset = rl_header["rl_head"] % rl_bufsize # Currently writing to this offset
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tail = rl_bufsize - offset # Total size till buffer end.
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rl_buffer = int(rl_header["rl_buffer"].address) # rl_buffer is a char array
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inf = gdb.selected_inferior()
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buf = bytes(inf.read_memory(offset + rl_buffer, tail))
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buf = buf.lstrip(b"\0") # Remove leading NULLs
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buf += bytes(inf.read_memory(rl_buffer, offset))
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buf = buf.replace(
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b"\0", "␀".encode("utf-8")
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) # NULL is valid utf-8 but not printable
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return buf.decode("utf-8", errors="replace")
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def diagnose(self, *args, **kwargs):
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buf = self._get_buf()
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return {
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"title": "RAM log",
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"summary": (
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f"Buffer length:{len(buf)} bytes" if buf else "Buffer not available"
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),
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"result": "info",
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"command": "dmesg",
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"message": buf,
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}
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def invoke(self, args, from_tty):
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gdb.write(f"{self._get_buf()}\n")
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