1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Common utilities for tools that deal with binary size information.
Copied from chromium/src/build/android/pylib/symbols/binary_size_tools.py.
"""
import logging
import re
def ParseNm(nm_lines):
"""Parse nm output, returning data for all relevant (to binary size)
symbols and ignoring the rest.
Args:
nm_lines: an iterable over lines of nm output.
Yields:
(symbol name, symbol type, symbol size, source file path).
Path may be None if nm couldn't figure out the source file.
"""
# Match lines with size, symbol, optional location, optional discriminator
sym_re = re.compile(r'^[0-9a-f]{8,} ' # address (8+ hex digits)
'([0-9a-f]{8,}) ' # size (8+ hex digits)
'(.) ' # symbol type, one character
'([^\t]+)' # symbol name, separated from next by tab
'(?:\t(.*):[\d\?]+)?.*$') # location
# Match lines with addr but no size.
addr_re = re.compile(r'^[0-9a-f]{8,} (.) ([^\t]+)(?:\t.*)?$')
# Match lines that don't have an address at all -- typically external symbols.
noaddr_re = re.compile(r'^ {8,} (.) (.*)$')
# Match lines with no symbol name, only addr and type
addr_only_re = re.compile(r'^[0-9a-f]{8,} (.)$')
for line in nm_lines:
line = line.rstrip()
match = sym_re.match(line)
if match:
size, sym_type, sym = match.groups()[0:3]
size = int(size, 16)
if sym_type in ('B', 'b'):
continue # skip all BSS for now.
path = match.group(4)
yield sym, sym_type, size, path
continue
match = addr_re.match(line)
if match:
# sym_type, sym = match.groups()[0:2]
continue # No size == we don't care.
match = noaddr_re.match(line)
if match:
sym_type, sym = match.groups()
if sym_type in ('U', 'w'):
continue # external or weak symbol
match = addr_only_re.match(line)
if match:
continue # Nothing to do.
# If we reach this part of the loop, there was something in the
# line that we didn't expect or recognize.
logging.warning('nm output parser failed to parse: %s', repr(line))
|
