esp-idf/components/esp_system/check_system_init_priorities.py

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#!/usr/bin/env python
#
# SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
# SPDX-License-Identifier: Apache-2.0
#
# This file is used to check the order of execution of ESP_SYSTEM_INIT_FN functions.
# It compares the priorities found in .c source files to the contents of system_init_fn.txt
# In case of an inconsistency, the script prints the differences found and returns with a
# non-zero exit code.
import difflib
import glob
import itertools
import os
import re
import sys
import typing
ESP_SYSTEM_INIT_FN_STR = r'ESP_SYSTEM_INIT_FN'
ESP_SYSTEM_INIT_FN_REGEX_SIMPLE = re.compile(r'ESP_SYSTEM_INIT_FN')
ESP_SYSTEM_INIT_FN_REGEX = re.compile(r'ESP_SYSTEM_INIT_FN\(([a-zA-Z0-9_]+)\s*,\s*([a-zA-Z\ _0-9\(\)|]+)\s*,\s*([a-zA-Z\ _0-9\(\)|]+)\s*,\s*([0-9]+)\)')
STARTUP_ENTRIES_FILE = 'components/esp_system/system_init_fn.txt'
class StartupEntry:
def __init__(self, filename: str, func: str, stage: str, affinity: str, priority: int) -> None:
self.filename = filename
self.func = func
self.stage = stage
self.affinity = affinity
self.priority = priority
def __str__(self) -> str:
return f'{self.stage}: {self.priority:3d}: {self.func} in {self.filename} on {self.affinity}'
def main() -> None:
try:
idf_path = os.environ['IDF_PATH']
except KeyError:
raise SystemExit('IDF_PATH must be set before running this script')
has_errors = False
startup_entries = [] # type: typing.List[StartupEntry]
#
# 1. Iterate over all .c and .cpp source files and find ESP_SYSTEM_INIT_FN definitions
#
source_files_iters = []
for extension in ('c', 'cpp'):
glob_iter = glob.glob(os.path.join(idf_path, 'components', '**', f'*.{extension}'), recursive=True)
source_files_iters.append(glob_iter)
for filename in itertools.chain(*source_files_iters):
with open(filename, 'r') as f_obj:
file_contents = f_obj.read()
if ESP_SYSTEM_INIT_FN_STR not in file_contents:
continue
count_expected = len(ESP_SYSTEM_INIT_FN_REGEX_SIMPLE.findall(file_contents))
found = ESP_SYSTEM_INIT_FN_REGEX.findall(file_contents)
if len(found) != count_expected:
print((f'error: In {filename}, found ESP_SYSTEM_INIT_FN {count_expected} time(s), '
f'but regular expression matched {len(found)} time(s)'), file=sys.stderr)
has_errors = True
for match in found:
entry = StartupEntry(
filename=os.path.relpath(filename, idf_path),
func=match[0],
stage=match[1],
affinity=match[2],
priority=int(match[3])
)
startup_entries.append(entry)
#
# 2. Sort the ESP_SYSTEM_INIT_FN functions in C source files.
# In addition to the stage and priority, we also add filename to the sort key,
# to have a stable sorting order in case when the same startup function is defined in multiple files,
# for example for different targets.
#
def sort_key(entry: StartupEntry) -> typing.Tuple[str, int, str]:
# luckily 'core' and 'secondary' are in alphabetical order, so we can return the string
return (entry.stage, entry.priority, entry.filename)
startup_entries = list(sorted(startup_entries, key=sort_key))
startup_entries_lines = [str(entry) for entry in startup_entries]
#
# 3. Load startup entries list from STARTUP_ENTRIES_FILE, removing comments and empty lines
#
startup_entries_expected_lines = []
with open(os.path.join(idf_path, STARTUP_ENTRIES_FILE), 'r') as startup_entries_expected_file:
for line in startup_entries_expected_file:
if line.startswith('#') or len(line.strip()) == 0:
continue
startup_entries_expected_lines.append(line.rstrip())
#
# 4. Print the list of differences, if any
#
diff_lines = list(difflib.unified_diff(startup_entries_expected_lines, startup_entries_lines, lineterm=''))
if len(diff_lines) > 0:
print(('error: startup order doesn\'t match the reference file. '
f'please update {STARTUP_ENTRIES_FILE} to match the actual startup order:'), file=sys.stderr)
for line in diff_lines:
print(f'{line}', file=sys.stderr)
has_errors = True
if has_errors:
raise SystemExit(1)
if __name__ == '__main__':
main()