circuitpython/tools/diff_nm_sizes.py

54 lines
1.4 KiB
Python

"""This script diffs two dumps of symbol sizes by matching up the symbol names
To generate the input files do something like:
arm-none-eabi-nm --size-sort build-bluemicro833/firmware.elf > new_sizes.txt
The command will vary by board and along with git state.
To print the diff do:
python diff_nm_sizes.py old_sizes.txt new_sizes.txt
"""
import sys
import pathlib
old = pathlib.Path(sys.argv[-2])
new = pathlib.Path(sys.argv[-1])
old_symbols = {}
old_total_size = 0
longest_symbol = 0
for line in old.read_text().split("\n"):
if not line:
continue
size, t, name = line.split()
old_size = int(size, 16)
old_total_size += old_size
old_symbols[name] = old_size
longest_symbol = max(longest_symbol, len(name))
new_total_size = 0
for line in new.read_text().split("\n"):
if not line:
continue
size, t, name = line.split()
size = int(size, 16)
new_total_size += size
if name not in old_symbols:
print(f"{name:<{longest_symbol}}{size:>+6}")
else:
old_size = old_symbols[name]
del old_symbols[name]
if size == old_size:
continue
print(f"{name:<{longest_symbol}}{size - old_size:>+6}")
for name in old_symbols:
old_size = old_symbols[name]
print(f"{name:<{longest_symbol}}{-old_size:>+6}")
print()
total_label = f"Total {new_total_size} - {old_total_size}"
print(f"{total_label:<{longest_symbol}}{new_total_size - old_total_size:>+6}")