blob: b9d3ad3ad2fe6b7b9c3b96d9b366149387d16291 [file] [log] [blame]
#!/usr/bin/env python
#===- lib/asan/scripts/ -----------------------------------===#
# The LLVM Compiler Infrastructure
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
import argparse
import bisect
import getopt
import os
import re
import subprocess
import sys
symbolizers = {}
DEBUG = False
demangle = False
binutils_prefix = None
sysroot_path = None
binary_name_filter = None
fix_filename_patterns = None
logfile = sys.stdin
allow_system_symbolizer = True
# FIXME: merge the code that calls fix_filename().
def fix_filename(file_name):
if fix_filename_patterns:
for path_to_cut in fix_filename_patterns:
file_name = re.sub('.*' + path_to_cut, '', file_name)
file_name = re.sub('.*asan_[a-z_]*.cc:[0-9]*', '_asan_rtl_', file_name)
file_name = re.sub('.*crtstuff.c:0', '???:0', file_name)
return file_name
def sysroot_path_filter(binary_name):
return sysroot_path + binary_name
def guess_arch(addr):
# Guess which arch we're running. 10 = len('0x') + 8 hex digits.
if len(addr) > 10:
return 'x86_64'
return 'i386'
class Symbolizer(object):
def __init__(self):
def symbolize(self, addr, binary, offset):
"""Symbolize the given address (pair of binary and offset).
Overriden in subclasses.
addr: virtual address of an instruction.
binary: path to executable/shared object containing this instruction.
offset: instruction offset in the @binary.
list of strings (one string for each inlined frame) describing
the code locations for this instruction (that is, function name, file
name, line and column numbers).
return None
class LLVMSymbolizer(Symbolizer):
def __init__(self, symbolizer_path, default_arch, system, dsym_hints=[]):
super(LLVMSymbolizer, self).__init__()
self.symbolizer_path = symbolizer_path
self.default_arch = default_arch
self.system = system
self.dsym_hints = dsym_hints
self.pipe = self.open_llvm_symbolizer()
def open_llvm_symbolizer(self):
cmd = [self.symbolizer_path,
'--demangle=%s' % demangle,
'--default-arch=%s' % self.default_arch]
if self.system == 'Darwin':
for hint in self.dsym_hints:
cmd.append('--dsym-hint=%s' % hint)
print ' '.join(cmd)
result = subprocess.Popen(cmd, stdin=subprocess.PIPE,
except OSError:
result = None
return result
def symbolize(self, addr, binary, offset):
"""Overrides Symbolizer.symbolize."""
if not self.pipe:
return None
result = []
symbolizer_input = '"%s" %s' % (binary, offset)
print symbolizer_input
print >> self.pipe.stdin, symbolizer_input
while True:
function_name = self.pipe.stdout.readline().rstrip()
if not function_name:
file_name = self.pipe.stdout.readline().rstrip()
file_name = fix_filename(file_name)
if (not function_name.startswith('??') or
not file_name.startswith('??')):
# Append only non-trivial frames.
result.append('%s in %s %s' % (addr, function_name,
except Exception:
result = []
if not result:
result = None
return result
def LLVMSymbolizerFactory(system, default_arch, dsym_hints=[]):
symbolizer_path = os.getenv('LLVM_SYMBOLIZER_PATH')
if not symbolizer_path:
symbolizer_path = os.getenv('ASAN_SYMBOLIZER_PATH')
if not symbolizer_path:
# Assume llvm-symbolizer is in PATH.
symbolizer_path = 'llvm-symbolizer'
return LLVMSymbolizer(symbolizer_path, default_arch, system, dsym_hints)
class Addr2LineSymbolizer(Symbolizer):
def __init__(self, binary):
super(Addr2LineSymbolizer, self).__init__()
self.binary = binary
self.pipe = self.open_addr2line()
def open_addr2line(self):
addr2line_tool = 'addr2line'
if binutils_prefix:
addr2line_tool = binutils_prefix + addr2line_tool
cmd = [addr2line_tool, '-f']
if demangle:
cmd += ['--demangle']
cmd += ['-e', self.binary]
print ' '.join(cmd)
return subprocess.Popen(cmd,
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
def symbolize(self, addr, binary, offset):
"""Overrides Symbolizer.symbolize."""
if self.binary != binary:
return None
print >> self.pipe.stdin, offset
function_name = self.pipe.stdout.readline().rstrip()
file_name = self.pipe.stdout.readline().rstrip()
except Exception:
function_name = ''
file_name = ''
file_name = fix_filename(file_name)
return ['%s in %s %s' % (addr, function_name, file_name)]
class UnbufferedLineConverter(object):
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, args, close_stderr=False):
# Local imports so that the script can start on Windows.
import pty
import termios
pid, fd = pty.fork()
if pid == 0:
# We're the child. Transfer control to command.
if close_stderr:
dev_null ='/dev/null', 0)
os.dup2(dev_null, 2)
os.execvp(args[0], args)
# 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.readline()
def readline(self):
return self.r.readline().rstrip()
class DarwinSymbolizer(Symbolizer):
def __init__(self, addr, binary):
super(DarwinSymbolizer, self).__init__()
self.binary = binary
self.arch = guess_arch(addr)
def open_atos(self):
print 'atos -o %s -arch %s' % (self.binary, self.arch)
cmdline = ['atos', '-o', self.binary, '-arch', self.arch]
self.atos = UnbufferedLineConverter(cmdline, close_stderr=True)
def symbolize(self, addr, binary, offset):
"""Overrides Symbolizer.symbolize."""
if self.binary != binary:
return None
atos_line = self.atos.convert('0x%x' % int(offset, 16))
while "got symbolicator for" in atos_line:
atos_line = self.atos.readline()
# A well-formed atos response looks like this:
# foo(type1, type2) (in (
match = re.match('^(.*) \(in (.*)\) \((.*:\d*)\)$', atos_line)
print 'atos_line: ', atos_line
if match:
function_name =
function_name = re.sub('\(.*?\)', '', function_name)
file_name = fix_filename(
return ['%s in %s %s' % (addr, function_name, file_name)]
return ['%s in %s' % (addr, atos_line)]
# Chain several symbolizers so that if one symbolizer fails, we fall back
# to the next symbolizer in chain.
class ChainSymbolizer(Symbolizer):
def __init__(self, symbolizer_list):
super(ChainSymbolizer, self).__init__()
self.symbolizer_list = symbolizer_list
def symbolize(self, addr, binary, offset):
"""Overrides Symbolizer.symbolize."""
for symbolizer in self.symbolizer_list:
if symbolizer:
result = symbolizer.symbolize(addr, binary, offset)
if result:
return result
return None
def append_symbolizer(self, symbolizer):
def BreakpadSymbolizerFactory(binary):
suffix = os.getenv('BREAKPAD_SUFFIX')
if suffix:
filename = binary + suffix
if os.access(filename, os.F_OK):
return BreakpadSymbolizer(filename)
return None
def SystemSymbolizerFactory(system, addr, binary):
if system == 'Darwin':
return DarwinSymbolizer(addr, binary)
elif system == 'Linux':
return Addr2LineSymbolizer(binary)
class BreakpadSymbolizer(Symbolizer):
def __init__(self, filename):
super(BreakpadSymbolizer, self).__init__()
self.filename = filename
lines = file(filename).readlines()
self.files = []
self.symbols = {}
self.address_list = []
self.addresses = {}
# MODULE mac x86_64 A7001116478B33F18FF9BEDE9F615F190 t
fragments = lines[0].rstrip().split()
self.arch = fragments[2]
self.debug_id = fragments[3]
self.binary = ' '.join(fragments[4:])
def parse_lines(self, lines):
cur_function_addr = ''
for line in lines:
fragments = line.split()
if fragments[0] == 'FILE':
assert int(fragments[1]) == len(self.files)
self.files.append(' '.join(fragments[2:]))
elif fragments[0] == 'PUBLIC':
self.symbols[int(fragments[1], 16)] = ' '.join(fragments[3:])
elif fragments[0] in ['CFI', 'STACK']:
elif fragments[0] == 'FUNC':
cur_function_addr = int(fragments[1], 16)
if not cur_function_addr in self.symbols.keys():
self.symbols[cur_function_addr] = ' '.join(fragments[4:])
# Line starting with an address.
addr = int(fragments[0], 16)
# Tuple of symbol address, size, line, file number.
self.addresses[addr] = (cur_function_addr,
int(fragments[1], 16),
def get_sym_file_line(self, addr):
key = None
if addr in self.addresses.keys():
key = addr
index = bisect.bisect_left(self.address_list, addr)
if index == 0:
return None
key = self.address_list[index - 1]
sym_id, size, line_no, file_no = self.addresses[key]
symbol = self.symbols[sym_id]
filename = self.files[file_no]
if addr < key + size:
return symbol, filename, line_no
return None
def symbolize(self, addr, binary, offset):
if self.binary != binary:
return None
res = self.get_sym_file_line(int(offset, 16))
if res:
function_name, file_name, line_no = res
result = ['%s in %s %s:%d' % (
addr, function_name, file_name, line_no)]
print result
return result
return None
class SymbolizationLoop(object):
def __init__(self, binary_name_filter=None, dsym_hint_producer=None):
if sys.platform == 'win32':
# ASan on Windows uses dbghelp.dll to symbolize in-process, which works
# even in sandboxed processes. Nothing needs to be done here.
self.process_line = self.process_line_echo
# Used by clients who may want to supply a different binary name.
# E.g. in Chrome several binaries may share a single .dSYM.
self.binary_name_filter = binary_name_filter
self.dsym_hint_producer = dsym_hint_producer
self.system = os.uname()[0]
if self.system not in ['Linux', 'Darwin', 'FreeBSD']:
raise Exception('Unknown system')
self.llvm_symbolizers = {}
self.last_llvm_symbolizer = None
self.dsym_hints = set([])
self.frame_no = 0
self.process_line = self.process_line_posix
def symbolize_address(self, addr, binary, offset):
# On non-Darwin (i.e. on platforms without .dSYM debug info) always use
# a single symbolizer binary.
# On Darwin, if the dsym hint producer is present:
# 1. check whether we've seen this binary already; if so,
# use |llvm_symbolizers[binary]|, which has already loaded the debug
# info for this binary (might not be the case for
# |last_llvm_symbolizer|);
# 2. otherwise check if we've seen all the hints for this binary already;
# if so, reuse |last_llvm_symbolizer| which has the full set of hints;
# 3. otherwise create a new symbolizer and pass all currently known
# .dSYM hints to it.
if not binary in self.llvm_symbolizers:
use_new_symbolizer = True
if self.system == 'Darwin' and self.dsym_hint_producer:
dsym_hints_for_binary = set(self.dsym_hint_producer(binary))
use_new_symbolizer = bool(dsym_hints_for_binary - self.dsym_hints)
self.dsym_hints |= dsym_hints_for_binary
if self.last_llvm_symbolizer and not use_new_symbolizer:
self.llvm_symbolizers[binary] = self.last_llvm_symbolizer
self.last_llvm_symbolizer = LLVMSymbolizerFactory(
self.system, guess_arch(addr), self.dsym_hints)
self.llvm_symbolizers[binary] = self.last_llvm_symbolizer
# Use the chain of symbolizers:
# Breakpad symbolizer -> LLVM symbolizer -> addr2line/atos
# (fall back to next symbolizer if the previous one fails).
if not binary in symbolizers:
symbolizers[binary] = ChainSymbolizer(
[BreakpadSymbolizerFactory(binary), self.llvm_symbolizers[binary]])
result = symbolizers[binary].symbolize(addr, binary, offset)
if result is None:
if not allow_system_symbolizer:
raise Exception('Failed to launch or use llvm-symbolizer.')
# Initialize system symbolizer only if other symbolizers failed.
SystemSymbolizerFactory(self.system, addr, binary))
result = symbolizers[binary].symbolize(addr, binary, offset)
# The system symbolizer must produce some result.
assert result
return result
def get_symbolized_lines(self, symbolized_lines):
if not symbolized_lines:
return [self.current_line]
result = []
for symbolized_frame in symbolized_lines:
result.append(' #%s %s' % (str(self.frame_no), symbolized_frame.rstrip()))
self.frame_no += 1
return result
def process_logfile(self):
self.frame_no = 0
for line in logfile:
processed = self.process_line(line)
print '\n'.join(processed)
def process_line_echo(self, line):
return [line.rstrip()]
def process_line_posix(self, line):
self.current_line = line.rstrip()
#0 0x7f6e35cf2e45 (/blah/
stack_trace_line_format = (
'^( *#([0-9]+) *)(0x[0-9a-f]+) *\((.*)\+(0x[0-9a-f]+)\)')
match = re.match(stack_trace_line_format, line)
if not match:
return [self.current_line]
print line
_, frameno_str, addr, binary, offset = match.groups()
if frameno_str == '0':
# Assume that frame #0 is the first frame of new stack trace.
self.frame_no = 0
original_binary = binary
if self.binary_name_filter:
binary = self.binary_name_filter(binary)
symbolized_line = self.symbolize_address(addr, binary, offset)
if not symbolized_line:
if original_binary != binary:
symbolized_line = self.symbolize_address(addr, binary, offset)
return self.get_symbolized_lines(symbolized_line)
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description='ASan symbolization script',
epilog='Example of use:\n'
' -c "$HOME/opt/cross/bin/arm-linux-gnueabi-" '
'-s "$HOME/SymbolFiles" < asan.log')
parser.add_argument('path_to_cut', nargs='*',
help='pattern to be cut from the result file path ')
parser.add_argument('-d','--demangle', action='store_true',
help='demangle function names')
parser.add_argument('-s', metavar='SYSROOT',
help='set path to sysroot for sanitized binaries')
parser.add_argument('-c', metavar='CROSS_COMPILE',
help='set prefix for binutils')
parser.add_argument('-l','--logfile', default=sys.stdin,
help='set log file name to parse, default is stdin')
args = parser.parse_args()
if args.path_to_cut:
fix_filename_patterns = args.path_to_cut
if args.demangle:
demangle = True
if args.s:
binary_name_filter = sysroot_path_filter
sysroot_path = args.s
if args.c:
binutils_prefix = args.c
if args.logfile:
logfile = args.logfile
logfile = sys.stdin
loop = SymbolizationLoop(binary_name_filter)