mirror of
https://github.com/littlefs-project/littlefs.git
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2cdabe810d
This is to avoid unexpected script behavior even though data.py should always return 0 bytes for littlefs. Maybe a check for this should be added to CI?
234 lines
8.3 KiB
Python
Executable File
234 lines
8.3 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Script to find data size at the function level. Basically just a bit wrapper
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# around nm with some extra conveniences for comparing builds. Heavily inspired
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# by Linux's Bloat-O-Meter.
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#
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import os
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import glob
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import itertools as it
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import subprocess as sp
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import shlex
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import re
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import csv
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import collections as co
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OBJ_PATHS = ['*.o']
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def collect(paths, **args):
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results = co.defaultdict(lambda: 0)
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pattern = re.compile(
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'^(?P<size>[0-9a-fA-F]+)' +
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' (?P<type>[%s])' % re.escape(args['type']) +
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' (?P<func>.+?)$')
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for path in paths:
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# note nm-tool may contain extra args
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cmd = args['nm_tool'] + ['--size-sort', path]
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if args.get('verbose'):
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print(' '.join(shlex.quote(c) for c in cmd))
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proc = sp.Popen(cmd,
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stdout=sp.PIPE,
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stderr=sp.PIPE if not args.get('verbose') else None,
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universal_newlines=True)
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for line in proc.stdout:
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m = pattern.match(line)
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if m:
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results[(path, m.group('func'))] += int(m.group('size'), 16)
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proc.wait()
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if proc.returncode != 0:
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if not args.get('verbose'):
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for line in proc.stderr:
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sys.stdout.write(line)
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sys.exit(-1)
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flat_results = []
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for (file, func), size in results.items():
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# map to source files
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if args.get('build_dir'):
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file = re.sub('%s/*' % re.escape(args['build_dir']), '', file)
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# discard internal functions
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if func.startswith('__'):
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continue
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# discard .8449 suffixes created by optimizer
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func = re.sub('\.[0-9]+', '', func)
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flat_results.append((file, func, size))
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return flat_results
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def main(**args):
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# find sizes
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if not args.get('use', None):
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# find .o files
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paths = []
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for path in args['obj_paths']:
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if os.path.isdir(path):
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path = path + '/*.o'
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for path in glob.glob(path):
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paths.append(path)
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if not paths:
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print('no .obj files found in %r?' % args['obj_paths'])
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sys.exit(-1)
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results = collect(paths, **args)
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else:
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with open(args['use']) as f:
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r = csv.DictReader(f)
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results = [
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( result['file'],
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result['function'],
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int(result['size']))
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for result in r]
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total = 0
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for _, _, size in results:
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total += size
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# find previous results?
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if args.get('diff'):
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with open(args['diff']) as f:
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r = csv.DictReader(f)
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prev_results = [
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( result['file'],
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result['function'],
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int(result['size']))
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for result in r]
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prev_total = 0
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for _, _, size in prev_results:
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prev_total += size
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# write results to CSV
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if args.get('output'):
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with open(args['output'], 'w') as f:
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w = csv.writer(f)
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w.writerow(['file', 'function', 'size'])
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for file, func, size in sorted(results):
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w.writerow((file, func, size))
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# print results
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def dedup_entries(results, by='function'):
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entries = co.defaultdict(lambda: 0)
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for file, func, size in results:
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entry = (file if by == 'file' else func)
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entries[entry] += size
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return entries
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def diff_entries(olds, news):
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diff = co.defaultdict(lambda: (0, 0, 0, 0))
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for name, new in news.items():
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diff[name] = (0, new, new, 1.0)
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for name, old in olds.items():
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_, new, _, _ = diff[name]
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diff[name] = (old, new, new-old, (new-old)/old if old else 1.0)
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return diff
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def sorted_entries(entries):
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if args.get('size_sort'):
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return sorted(entries.items(), key=lambda x: (-x[1], x))
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elif args.get('reverse_size_sort'):
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return sorted(entries.items(), key=lambda x: (+x[1], x))
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else:
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return sorted(entries.items())
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def sorted_diff_entries(entries):
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if args.get('size_sort'):
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return sorted(entries.items(), key=lambda x: (-x[1][1], x))
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elif args.get('reverse_size_sort'):
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return sorted(entries.items(), key=lambda x: (+x[1][1], x))
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else:
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return sorted(entries.items(), key=lambda x: (-x[1][3], x))
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def print_header(by=''):
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if not args.get('diff'):
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print('%-36s %7s' % (by, 'size'))
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else:
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print('%-36s %7s %7s %7s' % (by, 'old', 'new', 'diff'))
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def print_entries(by='function'):
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entries = dedup_entries(results, by=by)
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if not args.get('diff'):
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print_header(by=by)
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for name, size in sorted_entries(entries):
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print("%-36s %7d" % (name, size))
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else:
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prev_entries = dedup_entries(prev_results, by=by)
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diff = diff_entries(prev_entries, entries)
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print_header(by='%s (%d added, %d removed)' % (by,
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sum(1 for old, _, _, _ in diff.values() if not old),
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sum(1 for _, new, _, _ in diff.values() if not new)))
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for name, (old, new, diff, ratio) in sorted_diff_entries(diff):
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if ratio or args.get('all'):
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print("%-36s %7s %7s %+7d%s" % (name,
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old or "-",
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new or "-",
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diff,
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' (%+.1f%%)' % (100*ratio) if ratio else ''))
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def print_totals():
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if not args.get('diff'):
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print("%-36s %7d" % ('TOTAL', total))
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else:
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ratio = (total-prev_total)/prev_total if prev_total else 1.0
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print("%-36s %7s %7s %+7d%s" % (
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'TOTAL',
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prev_total if prev_total else '-',
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total if total else '-',
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total-prev_total,
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' (%+.1f%%)' % (100*ratio) if ratio else ''))
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if args.get('quiet'):
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pass
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elif args.get('summary'):
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print_header()
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print_totals()
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elif args.get('files'):
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print_entries(by='file')
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print_totals()
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else:
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print_entries(by='function')
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print_totals()
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if __name__ == "__main__":
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import argparse
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import sys
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parser = argparse.ArgumentParser(
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description="Find data size at the function level.")
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parser.add_argument('obj_paths', nargs='*', default=OBJ_PATHS,
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help="Description of where to find *.o files. May be a directory \
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or a list of paths. Defaults to %r." % OBJ_PATHS)
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parser.add_argument('-v', '--verbose', action='store_true',
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help="Output commands that run behind the scenes.")
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parser.add_argument('-o', '--output',
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help="Specify CSV file to store results.")
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parser.add_argument('-u', '--use',
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help="Don't compile and find data sizes, instead use this CSV file.")
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parser.add_argument('-d', '--diff',
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help="Specify CSV file to diff data size against.")
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parser.add_argument('-a', '--all', action='store_true',
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help="Show all functions, not just the ones that changed.")
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parser.add_argument('-s', '--size-sort', action='store_true',
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help="Sort by size.")
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parser.add_argument('-S', '--reverse-size-sort', action='store_true',
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help="Sort by size, but backwards.")
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parser.add_argument('--files', action='store_true',
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help="Show file-level data sizes. Note this does not include padding! "
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"So sizes may differ from other tools.")
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parser.add_argument('--summary', action='store_true',
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help="Only show the total data size.")
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parser.add_argument('-q', '--quiet', action='store_true',
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help="Don't show anything, useful with -o.")
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parser.add_argument('--type', default='dDbB',
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help="Type of symbols to report, this uses the same single-character "
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"type-names emitted by nm. Defaults to %(default)r.")
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parser.add_argument('--nm-tool', default=['nm'], type=lambda x: x.split(),
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help="Path to the nm tool to use.")
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parser.add_argument('--build-dir',
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help="Specify the relative build directory. Used to map object files \
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to the correct source files.")
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sys.exit(main(**vars(parser.parse_args())))
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