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Side by Side Diff: infra/bots/recipe_modules/skia/resources/binary_size_utils.py

Issue 2198173002: Re-organize Skia recipes (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Fix missing dependency Created 4 years, 4 months ago
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1 # Copyright 2014 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
4
5 """Common utilities for tools that deal with binary size information.
6
7 Copied from chromium/src/build/android/pylib/symbols/binary_size_tools.py.
8 """
9
10 import logging
11 import re
12
13
14 def ParseNm(nm_lines):
15 """Parse nm output, returning data for all relevant (to binary size)
16 symbols and ignoring the rest.
17
18 Args:
19 nm_lines: an iterable over lines of nm output.
20
21 Yields:
22 (symbol name, symbol type, symbol size, source file path).
23
24 Path may be None if nm couldn't figure out the source file.
25 """
26
27 # Match lines with size, symbol, optional location, optional discriminator
28 sym_re = re.compile(r'^[0-9a-f]{8,} ' # address (8+ hex digits)
29 '([0-9a-f]{8,}) ' # size (8+ hex digits)
30 '(.) ' # symbol type, one character
31 '([^\t]+)' # symbol name, separated from next by tab
32 '(?:\t(.*):[\d\?]+)?.*$') # location
33 # Match lines with addr but no size.
34 addr_re = re.compile(r'^[0-9a-f]{8,} (.) ([^\t]+)(?:\t.*)?$')
35 # Match lines that don't have an address at all -- typically external symbols.
36 noaddr_re = re.compile(r'^ {8,} (.) (.*)$')
37 # Match lines with no symbol name, only addr and type
38 addr_only_re = re.compile(r'^[0-9a-f]{8,} (.)$')
39
40 for line in nm_lines:
41 line = line.rstrip()
42 match = sym_re.match(line)
43 if match:
44 size, sym_type, sym = match.groups()[0:3]
45 size = int(size, 16)
46 if sym_type in ('B', 'b'):
47 continue # skip all BSS for now.
48 path = match.group(4)
49 yield sym, sym_type, size, path
50 continue
51 match = addr_re.match(line)
52 if match:
53 # sym_type, sym = match.groups()[0:2]
54 continue # No size == we don't care.
55 match = noaddr_re.match(line)
56 if match:
57 sym_type, sym = match.groups()
58 if sym_type in ('U', 'w'):
59 continue # external or weak symbol
60 match = addr_only_re.match(line)
61 if match:
62 continue # Nothing to do.
63
64
65 # If we reach this part of the loop, there was something in the
66 # line that we didn't expect or recognize.
67 logging.warning('nm output parser failed to parse: %s', repr(line))
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