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175 lines
6.7 KiB
Python
Executable File
175 lines
6.7 KiB
Python
Executable File
#!/usr/bin/python
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# vim:sw=4:ts=4:et:
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# ***** BEGIN LICENSE BLOCK *****
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# Version: MPL 1.1/GPL 2.0/LGPL 2.1
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#
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# The contents of this file are subject to the Mozilla Public License Version
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# 1.1 (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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# http://www.mozilla.org/MPL/
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#
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# Software distributed under the License is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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# for the specific language governing rights and limitations under the
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# License.
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#
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# The Original Code is fix-linux-stack.pl.
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#
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# The Initial Developer of the Original Code is L. David Baron.
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# Portions created by the Initial Developer are Copyright (C) 2003
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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# L. David Baron <dbaron@dbaron.org> (original author)
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#
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# Alternatively, the contents of this file may be used under the terms of
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# either the GNU General Public License Version 2 or later (the "GPL"), or
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# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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# in which case the provisions of the GPL or the LGPL are applicable instead
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# of those above. If you wish to allow use of your version of this file only
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# under the terms of either the GPL or the LGPL, and not to allow others to
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# use your version of this file under the terms of the MPL, indicate your
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# decision by deleting the provisions above and replace them with the notice
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# and other provisions required by the GPL or the LGPL. If you do not delete
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# the provisions above, a recipient may use your version of this file under
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# the terms of any one of the MPL, the GPL or the LGPL.
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#
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# ***** END LICENSE BLOCK *****
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# This script uses atos to process the output of nsTraceRefcnt's Mac OS
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# X stack walking code. This is useful for two things:
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# (1) Getting line number information out of
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# |nsTraceRefcntImpl::WalkTheStack|'s output in debug builds.
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# (2) Getting function names out of |nsTraceRefcntImpl::WalkTheStack|'s
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# output on all builds (where it mostly prints UNKNOWN because only
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# a handful of symbols are exported from component libraries).
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#
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# Use the script by piping output containing stacks (such as raw stacks
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# or make-tree.pl balance trees) through this script.
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import subprocess
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import sys
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import re
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import os
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import pty
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import termios
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class unbufferedLineConverter:
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"""
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Wrap a child process that responds to each line of input with one line of
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output. Uses pty to trick the child into providing unbuffered output.
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"""
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def __init__(self, command, args = []):
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pid, fd = pty.fork()
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if pid == 0:
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# We're the child. Transfer control to command.
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os.execvp(command, [command] + args)
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else:
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# Disable echoing.
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attr = termios.tcgetattr(fd)
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attr[3] = attr[3] & ~termios.ECHO
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termios.tcsetattr(fd, termios.TCSANOW, attr)
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# Set up a file()-like interface to the child process
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self.r = os.fdopen(fd, "r", 1)
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self.w = os.fdopen(os.dup(fd), "w", 1)
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def convert(self, line):
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self.w.write(line + "\n")
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return self.r.readline().rstrip("\r\n")
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@staticmethod
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def test():
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assert unbufferedLineConverter("rev").convert("123") == "321"
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assert unbufferedLineConverter("cut", ["-c3"]).convert("abcde") == "c"
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print "Pass"
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def separate_debug_file_for(file):
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return None
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address_adjustments = {}
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def address_adjustment(file):
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if not file in address_adjustments:
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result = None
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otool = subprocess.Popen(["otool", "-l", file], stdout=subprocess.PIPE)
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while True:
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line = otool.stdout.readline()
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if line == "":
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break
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if line == " segname __TEXT\n":
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line = otool.stdout.readline()
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if not line.startswith(" vmaddr "):
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raise StandardError("unexpected otool output")
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result = int(line[10:], 16)
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break
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otool.stdout.close()
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if result is None:
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raise StandardError("unexpected otool output")
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address_adjustments[file] = result
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return address_adjustments[file]
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atoses = {}
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def addressToSymbol(file, address):
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converter = None
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if not file in atoses:
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debug_file = separate_debug_file_for(file) or file
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converter = unbufferedLineConverter('/usr/bin/atos', ['-o', debug_file])
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atoses[file] = converter
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else:
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converter = atoses[file]
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return converter.convert("0x%X" % address)
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cxxfilt_proc = None
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def cxxfilt(sym):
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if cxxfilt_proc is None:
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globals()["cxxfilt_proc"] = subprocess.Popen(['c++filt',
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'--no-strip-underscores',
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'--format', 'gnu-v3'],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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# strip underscores ourselves (works better than c++filt's
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# --strip-underscores)
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cxxfilt_proc.stdin.write(sym[1:] + "\n")
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return cxxfilt_proc.stdout.readline().rstrip("\n")
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line_re = re.compile("^(.*) ?\[([^ ]*) \+(0x[0-9A-F]{1,8})\](.*)$")
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balance_tree_re = re.compile("^([ \|0-9-]*)")
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atos_sym_re = re.compile("^(\S+) \(in ([^)]+)\) \((.+)\)$")
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def fixSymbols(line):
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result = line_re.match(line)
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if result is not None:
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# before allows preservation of balance trees
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# after allows preservation of counts
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(before, file, address, after) = result.groups()
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address = int(address, 16)
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if os.path.exists(file) and os.path.isfile(file):
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address += address_adjustment(file)
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info = addressToSymbol(file, address)
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# atos output seems to have three forms:
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# address
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# address (in foo.dylib)
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# symbol (in foo.dylib) (file:line)
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symresult = atos_sym_re.match(info)
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if symresult is not None:
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# Print the first two forms as-is, and transform the third
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(symbol, library, fileline) = symresult.groups()
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symbol = cxxfilt(symbol)
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info = "%s (%s, in %s)" % (symbol, fileline, library)
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# throw away the bad symbol, but keep balance tree structure
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before = balance_tree_re.match(before).groups()[0]
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return before + info + after + "\n"
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else:
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sys.stderr.write("Warning: File \"" + file + "\" does not exist.\n")
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return line
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else:
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return line
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if __name__ == "__main__":
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for line in sys.stdin:
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sys.stdout.write(fixSymbols(line))
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