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Copy pathbuild_memory_info.py
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63 lines (52 loc) · 1.93 KB
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#!/usr/bin/env python3
# SPDX-FileCopyrightText: Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
# SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)
#
# SPDX-License-Identifier: MIT
import re
import sys
# Handle size constants with K or M suffixes (allowed in .ld but not in Python).
K_PATTERN = re.compile(r'([0-9]+)K')
K_REPLACE = r'(\1*1024)'
M_PATTERN = re.compile(r'([0-9]+)M')
M_REPLACE = r'(\1*1024*1024)'
print()
text = 0
data = 0
bss = 0
# stdin is the linker output.
for line in sys.stdin:
# Uncomment to see linker output.
# print(line)
line = line.strip()
if not line.startswith("text"):
text, data, bss = map(int, line.split()[:3])
regions = {}
# This file is the linker script.
with open(sys.argv[1], "r") as f:
for line in f:
line = line.strip()
if line.startswith(("FLASH_FIRMWARE", "RAM")):
regions[line.split()[0]] = line.split("=")[-1]
for region in regions:
space = regions[region]
if "/*" in space:
space = space.split("/*")[0]
space = K_PATTERN.sub(K_REPLACE, space)
space = M_PATTERN.sub(M_REPLACE, space)
regions[region] = int(eval(space))
firmware_region = regions["FLASH_FIRMWARE"]
ram_region = regions["RAM"]
used_flash = data + text
free_flash = firmware_region - used_flash
used_ram = data + bss
free_ram = ram_region - used_ram
print("{} bytes used, {} bytes free in flash firmware space out of {} bytes ({}kB).".format(used_flash, free_flash, firmware_region, firmware_region / 1024))
print("{} bytes used, {} bytes free in ram for stack and heap out of {} bytes ({}kB).".format(used_ram, free_ram, ram_region, ram_region / 1024))
print()
# Check that we have free flash space. GCC doesn't fail when the text + data
# sections don't fit in FLASH. It only counts data in RAM.
if free_flash < 0:
print("Too little flash!!!")
print()
sys.exit(-1)