forked from Archive/PX4-Autopilot
124 lines
3.8 KiB
Python
Executable File
124 lines
3.8 KiB
Python
Executable File
#!/usr/bin/env python
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############################################################################
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#
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# Copyright (C) 2015 Mark Charlebois. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# 3. Neither the name PX4 nor the names of its contributors may be
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# used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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############################################################################
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import os
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import subprocess
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# The PX4_BACKTRACE() macro can be used to generate backtraces in the
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# running code. These provide the addresses only. This utility can be
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# used to decode the backtrace into a readable form:
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#
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# Example:
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# If the following lines were pasted into the shell after running decode_backtrace.py
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#
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# INFO Backtrace: 10
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# INFO ./px4(px4_backtrace+0x27) [0x42b212]
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# INFO ./px4() [0x42d608]
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# INFO ./px4() [0x42d57e]
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# INFO ./px4() [0x4ba48d]
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#
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# The output would be:
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#
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# 0x42b212 px4_backtrace (0x42b1eb)
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# 0x42d608 ACCELSIM::devRead(void*, unsigned long) (0x42d600)
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# 0x42d57e ACCELSIM::start() (0x42d578)
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# 0x4ba48d DriverFramework::DevObj::addHandle(DriverFramework::DevHandle&) (0x4ba42e)
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#
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# The output format is:
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# <backtrace address> <function name> (<function address>)
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def usage():
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msg = """
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Usage: Tools/decode_backtrace.py <builddir>
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This will load the symbols for <builddir>/src/firmware/posix/px4
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The user just needs to copy and paste the backtrace into the terminal
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where decode_backtrace.py is running.
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"""
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print msg
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funcaddr = []
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func = []
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# Load the symbols from the binary
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def load_symbol_map():
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output = subprocess.check_output(["nm", "-p", "-C", os.sys.argv[1]+"/src/firmware/posix/px4"])
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data = output.split("\n")
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data.sort()
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i = 0
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for line in data:
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if line.startswith("0"):
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funcaddr.append(int(line[0:16],16))
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func.append(line[19:])
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#print(hex(funcaddr[i]), func[i])
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i = i+1
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# Find the function for the specified call stack address
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def lookup(addr):
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i=1
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while i < len(funcaddr) and addr > funcaddr[i]:
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i=i+1
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if i >= len(funcaddr):
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return -1
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# return the function before this one
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return i-1
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if len(os.sys.argv) != 2:
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usage()
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raise SystemExit
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load_symbol_map()
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print
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print "Paste the backtrace here. Use Ctrl-C to exit."
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print
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while 1:
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# Wait for user to paste the backtrace into the shell
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line = raw_input()
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tmp = line.split("[")
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if len(tmp) == 1:
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if len(line.split("Backtrace:")) > 1:
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print
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continue
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addrstr = tmp[1].split("]")[0]
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addr = int(addrstr, 16)
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idx = lookup(addr)
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if idx >= 0:
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print hex(addr), func[idx], "({0})".format(hex(funcaddr[idx]))
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