| # 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)) |