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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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