mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/tools/rb/fix_linux_stack.py

318 строки
13 KiB
Python
Executable File
Исходник Ответственный История

#!/usr/bin/python
# vim:sw=4:ts=4:et:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
# This script uses addr2line (part of binutils) to post-process the entries
# produced by NS_FormatCodeAddress(), which on Linux often lack a function
# name, a file name and a line number.
import subprocess
import sys
import re
import os
import pty
import termios
from StringIO import StringIO
class unbufferedLineConverter:
"""
Wrap a child process that responds to each line of input with one line of
output. Uses pty to trick the child into providing unbuffered output.
"""
def __init__(self, command, args = []):
pid, fd = pty.fork()
if pid == 0:
# We're the child. Transfer control to command.
os.execvp(command, [command] + args)
else:
# Disable echoing.
attr = termios.tcgetattr(fd)
attr[3] = attr[3] & ~termios.ECHO
termios.tcsetattr(fd, termios.TCSANOW, attr)
# Set up a file()-like interface to the child process
self.r = os.fdopen(fd, "r", 1)
self.w = os.fdopen(os.dup(fd), "w", 1)
def convert(self, line):
self.w.write(line + "\n")
return (self.r.readline().rstrip("\r\n"), self.r.readline().rstrip("\r\n"))
@staticmethod
def test():
assert unbufferedLineConverter("rev").convert("123") == "321"
assert unbufferedLineConverter("cut", ["-c3"]).convert("abcde") == "c"
print "Pass"
objdump_section_re = re.compile("^ [0-9a-f]* ([0-9a-f ]{8}) ([0-9a-f ]{8}) ([0-9a-f ]{8}) ([0-9a-f ]{8}).*")
def elf_section(file, section):
"""
Return the requested ELF section of the file as a str, representing
a sequence of bytes.
"""
# We can read the .gnu_debuglink section using either of:
# objdump -s --section=.gnu_debuglink $file
# readelf -x .gnu_debuglink $file
# Since readelf prints things backwards on little-endian platforms
# for some versions only (backwards on Fedora Core 6, forwards on
# Fedora 7), use objdump.
objdump = subprocess.Popen(['objdump', '-s', '--section=' + section, file],
stdout=subprocess.PIPE,
# redirect stderr so errors don't get printed
stderr=subprocess.PIPE)
(objdump_stdout, objdump_stderr) = objdump.communicate()
if objdump.returncode != 0:
return None
result = ""
# Turn hexadecimal dump into the bytes it represents
for line in StringIO(objdump_stdout).readlines():
m = objdump_section_re.match(line)
if m:
for gnum in [0, 1, 2, 3]:
word = m.groups()[gnum]
if word != " ":
for idx in [0, 2, 4, 6]:
result += chr(int(word[idx:idx+2], 16))
return result
# FIXME: Hard-coded to gdb defaults (works on Fedora and Ubuntu).
global_debug_dir = '/usr/lib/debug';
endian_re = re.compile("\s*Data:\s+.*(little|big) endian.*$")
# Table of 256 values, per documentation of .gnu_debuglink sections.
gnu_debuglink_crc32_table = [
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
0x2d02ef8d
]
def gnu_debuglink_crc32(stream):
# Note that python treats bitwise operators as though integers have
# an infinite number of bits (and thus such that negative integers
# 1-pad out to infinity).
crc = 0xffffffff
while True:
# Choose to read in 4096 byte chunks.
bytes = stream.read(4096)
if len(bytes) == 0:
break
for byte in bytes:
crc = gnu_debuglink_crc32_table[(crc ^ ord(byte)) & 0xff] ^ (crc >> 8)
return ~crc & 0xffffffff
def separate_debug_file_for(file):
"""
Finds a separated file with the debug sections for a binary. Such
files are commonly installed by debug packages on linux distros.
Rules for finding them are documented in:
https://sourceware.org/gdb/current/onlinedocs/gdb/Separate-Debug-Files.html
"""
def have_debug_file(debugfile):
return os.path.isfile(debugfile)
endian = None
readelf = subprocess.Popen(['readelf', '-h', file],
stdout=subprocess.PIPE)
for line in readelf.stdout.readlines():
m = endian_re.match(line)
if m:
endian = m.groups()[0]
break
readelf.terminate()
if endian is None:
sys.stderr.write("Could not determine endianness of " + file + "\n")
return None
def word32(s):
if type(s) != str or len(s) != 4:
raise StandardError("expected 4 byte string input")
s = list(s)
if endian == "big":
s.reverse()
return sum(map(lambda idx: ord(s[idx]) * (256 ** idx), range(0, 4)))
buildid = elf_section(file, ".note.gnu.build-id");
if buildid is not None:
# The build ID is an ELF note section, so it begins with a
# name size (4), a description size (size of contents), a
# type (3), and the name "GNU\0".
note_header = buildid[0:16]
buildid = buildid[16:]
if word32(note_header[0:4]) != 4 or \
word32(note_header[4:8]) != len(buildid) or \
word32(note_header[8:12]) != 3 or \
note_header[12:16] != "GNU\0":
sys.stderr.write("malformed .note.gnu.build_id in " + file + "\n")
else:
buildid = "".join(map(lambda ch: "%02X" % ord(ch), buildid)).lower()
f = os.path.join(global_debug_dir, ".build-id", buildid[0:2], buildid[2:] + ".debug")
if have_debug_file(f):
return f
debuglink = elf_section(file, ".gnu_debuglink");
if debuglink is not None:
# The debuglink section contains a string, ending with a
# null-terminator and then 0 to three bytes of padding to fill the
# current 32-bit unit. (This padding is usually null bytes, but
# I've seen null-null-H, on Ubuntu x86_64.) This is followed by
# a 4-byte CRC.
debuglink_name = debuglink[:-4]
null_idx = debuglink_name.find("\0")
if null_idx == -1 or null_idx + 4 < len(debuglink_name):
sys.stderr.write("Malformed .gnu_debuglink in " + file + "\n")
return None
debuglink_name = debuglink_name[0:null_idx]
debuglink_crc = word32(debuglink[-4:])
dirname = os.path.dirname(file)
possible_files = [
os.path.join(dirname, debuglink_name),
os.path.join(dirname, ".debug", debuglink_name),
os.path.join(global_debug_dir, dirname.lstrip("/"), debuglink_name)
]
for f in possible_files:
if have_debug_file(f):
fio = open(f, mode="r")
file_crc = gnu_debuglink_crc32(fio)
fio.close()
if file_crc == debuglink_crc:
return f
return None
elf_type_re = re.compile("^\s*Type:\s+(\S+)")
elf_text_section_re = re.compile("^\s*\[\s*\d+\]\s+\.text\s+\w+\s+(\w+)\s+(\w+)\s+")
def address_adjustment_for(file):
"""
Return the address adjustment to use for a file.
addr2line wants offsets relative to the base address for shared
libraries, but it wants addresses including the base address offset
for executables. This returns the appropriate address adjustment to
add to an offset within file. See bug 230336.
"""
readelf = subprocess.Popen(['readelf', '-h', file],
stdout=subprocess.PIPE)
elftype = None
for line in readelf.stdout.readlines():
m = elf_type_re.match(line)
if m:
elftype = m.groups()[0]
break
readelf.terminate()
if elftype != "EXEC":
# If we're not dealing with an executable, return 0.
return 0
adjustment = 0
readelf = subprocess.Popen(['readelf', '-S', file],
stdout=subprocess.PIPE)
for line in readelf.stdout.readlines():
m = elf_text_section_re.match(line)
if m:
# Subtract the .text section's offset within the
# file from its base address.
adjustment = int(m.groups()[0], 16) - int(m.groups()[1], 16);
break
readelf.terminate()
return adjustment
addr2lines = {}
def addressToSymbol(file, address):
converter = None
address_adjustment = None
cache = None
if not file in addr2lines:
debug_file = separate_debug_file_for(file) or file
converter = unbufferedLineConverter('/usr/bin/addr2line', ['-C', '-f', '-e', debug_file])
address_adjustment = address_adjustment_for(file)
cache = {}
addr2lines[file] = (converter, address_adjustment, cache)
else:
(converter, address_adjustment, cache) = addr2lines[file]
if address in cache:
return cache[address]
result = converter.convert(hex(int(address, 16) + address_adjustment))
cache[address] = result
return result
# Matches lines produced by NS_FormatCodeAddress().
line_re = re.compile("^(.*#\d+: )(.+)\[(.+) \+(0x[0-9A-Fa-f]+)\](.*)$")
def fixSymbols(line):
result = line_re.match(line)
if result is not None:
(before, fn, file, address, after) = result.groups()
if os.path.exists(file) and os.path.isfile(file):
(name, fileline) = addressToSymbol(file, address)
# If addr2line gave us something useless, keep what we had before.
if name == "??":
name = fn
if fileline == "??:0" or fileline == "??:?":
fileline = file
nl = '\n' if line[-1] == '\n' else ''
return "%s%s (%s)%s%s" % (before, name, fileline, after, nl)
else:
sys.stderr.write("Warning: File \"" + file + "\" does not exist.\n")
return line
else:
return line
if __name__ == "__main__":
for line in sys.stdin:
sys.stdout.write(fixSymbols(line))
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку