esp-idf/tools/ci/check_public_headers.py

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#!/usr/bin/env python
#
# Checks all public headers in IDF in the ci
#
# SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
# SPDX-License-Identifier: Apache-2.0
#
from __future__ import print_function, unicode_literals
import argparse
import fnmatch
import json
import os
import queue
import re
import subprocess
import tempfile
from io import open
from threading import Event, Thread
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from typing import List, Optional, Set, Tuple, Union
class HeaderFailed(Exception):
"""Base header failure exeption"""
pass
class HeaderFailedSdkconfig(HeaderFailed):
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def __str__(self) -> str:
return 'Sdkconfig Error'
class HeaderFailedBuildError(HeaderFailed):
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def __str__(self) -> str:
return 'Header Build Error'
class HeaderFailedCppGuardMissing(HeaderFailed):
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def __str__(self) -> str:
return 'Header Missing C++ Guard'
class HeaderFailedContainsCode(HeaderFailed):
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def __str__(self) -> str:
return 'Header Produced non-zero object'
class HeaderFailedContainsStaticAssert(HeaderFailed):
def __str__(self) -> str:
return 'Header uses _Static_assert or static_assert instead of ESP_STATIC_ASSERT'
# Creates a temp file and returns both output as a string and a file name
#
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def exec_cmd_to_temp_file(what: List, suffix: str='') -> Tuple[int, str, str, str, str]:
out_file = tempfile.NamedTemporaryFile(suffix=suffix, delete=False)
rc, out, err, cmd = exec_cmd(what, out_file)
with open(out_file.name, 'r', encoding='utf-8') as f:
out = f.read()
return rc, out, err, out_file.name, cmd
def exec_cmd(what: List, out_file: Union['tempfile._TemporaryFileWrapper[bytes]', int]=subprocess.PIPE) -> Tuple[int, str, str, str]:
p = subprocess.Popen(what, stdin=subprocess.PIPE, stdout=out_file, stderr=subprocess.PIPE)
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output_b, err_b = p.communicate()
rc = p.returncode
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output: str = output_b.decode('utf-8') if output_b is not None else ''
err: str = err_b.decode('utf-8') if err_b is not None else ''
return rc, output, err, ' '.join(what)
class PublicHeaderChecker:
# Intermediate results
COMPILE_ERR_REF_CONFIG_HDR_FAILED = 1 # -> Cannot compile and failed with injected SDKCONFIG #error (header FAILs)
COMPILE_ERR_ERROR_MACRO_HDR_OK = 2 # -> Cannot compile, but failed with "#error" directive (header seems OK)
COMPILE_ERR_HDR_FAILED = 3 # -> Cannot compile with another issue, logged if verbose (header FAILs)
PREPROC_OUT_ZERO_HDR_OK = 4 # -> Both preprocessors produce zero out (header file is OK)
PREPROC_OUT_SAME_HRD_FAILED = 5 # -> Both preprocessors produce the same, non-zero output (header file FAILs)
PREPROC_OUT_DIFFERENT_WITH_EXT_C_HDR_OK = 6 # -> Both preprocessors produce different, non-zero output with extern "C" (header seems OK)
PREPROC_OUT_DIFFERENT_NO_EXT_C_HDR_FAILED = 7 # -> Both preprocessors produce different, non-zero output without extern "C" (header fails)
HEADER_CONTAINS_STATIC_ASSERT = 8 # -> Header file contains _Static_assert instead of static_assert or ESP_STATIC_ASSERT
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def log(self, message: str, debug: bool=False) -> None:
if self.verbose or debug:
print(message)
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def __init__(self, verbose: bool=False, jobs: int=1, prefix: Optional[str]=None) -> None:
self.gcc = '{}gcc'.format(prefix)
self.gpp = '{}g++'.format(prefix)
self.verbose = verbose
self.jobs = jobs
self.prefix = prefix
self.extern_c = re.compile(r'extern "C"')
self.error_macro = re.compile(r'#error')
self.error_orphan_kconfig = re.compile(r'#error CONFIG_VARS_USED_WHILE_SDKCONFIG_NOT_INCLUDED')
self.kconfig_macro = re.compile(r'\bCONFIG_[A-Z0-9_]+')
self.static_assert = re.compile(r'(_Static_assert|static_assert)')
self.defines_assert = re.compile(r'#define[ \t]+ESP_STATIC_ASSERT')
self.auto_soc_header = re.compile(r'components/soc/esp[a-z0-9_]+/include(?:/rev[0-9]+)?/(soc|modem)/[a-zA-Z0-9_]+.h')
self.assembly_nocode = r'^\s*(\.file|\.text|\.ident|\.option|\.attribute).*$'
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self.check_threads: List[Thread] = []
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self.job_queue: queue.Queue = queue.Queue()
self.failed_queue: queue.Queue = queue.Queue()
self.terminate = Event()
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def __enter__(self) -> 'PublicHeaderChecker':
for i in range(self.jobs):
t = Thread(target=self.check_headers, args=(i, ))
self.check_threads.append(t)
t.start()
return self
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def __exit__(self, exc_type: str, exc_value: str, traceback: str) -> None:
self.terminate.set()
for t in self.check_threads:
t.join()
# thread function process incoming header file from a queue
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def check_headers(self, num: int) -> None:
while not self.terminate.is_set():
if not self.job_queue.empty():
task = self.job_queue.get()
if task is None:
self.terminate.set()
else:
try:
self.check_one_header(task, num)
except HeaderFailed as e:
self.failed_queue.put('{}: Failed! {}'.format(task, e))
except Exception as e:
# Makes sure any unexpected exceptions causes the program to terminate
self.failed_queue.put('{}: Failed! {}'.format(task, e))
self.terminate.set()
raise
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def get_failed(self) -> List:
return list(self.failed_queue.queue)
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def join(self) -> None:
for t in self.check_threads:
while t.is_alive() and not self.terminate.is_set():
t.join(1) # joins with timeout to respond to keyboard interrupt
# Checks one header calling:
# - preprocess_one_header() to test and compare preprocessor outputs
# - check_no_code() to test if header contains some executable code
# Procedure
# 1) Preprocess the include file with C preprocessor and with CPP preprocessor
# - Pass the test if the preprocessor outputs are the same and whitespaces only (#define only header)
# - Fail the test if the preprocessor outputs are the same (but with some code)
# - If outputs different, continue with 2)
# 2) Strip out all include directives to generate "temp.h"
# 3) Preprocess the temp.h the same way in (1)
# - Pass the test if the preprocessor outputs are the same and whitespaces only (#include only header)
# - Fail the test if the preprocessor outputs are the same (but with some code)
# - If outputs different, pass the test
# 4) If header passed the steps 1) and 3) test that it produced zero assembly code
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def check_one_header(self, header: str, num: int) -> None:
res = self.preprocess_one_header(header, num)
if res == self.COMPILE_ERR_REF_CONFIG_HDR_FAILED:
raise HeaderFailedSdkconfig()
elif res == self.COMPILE_ERR_ERROR_MACRO_HDR_OK:
return self.compile_one_header(header)
elif res == self.COMPILE_ERR_HDR_FAILED:
raise HeaderFailedBuildError()
elif res == self.PREPROC_OUT_ZERO_HDR_OK:
return self.compile_one_header(header)
elif res == self.PREPROC_OUT_SAME_HRD_FAILED:
raise HeaderFailedCppGuardMissing()
elif res == self.HEADER_CONTAINS_STATIC_ASSERT:
raise HeaderFailedContainsStaticAssert()
else:
self.compile_one_header(header)
temp_header = None
try:
_, _, _, temp_header, _ = exec_cmd_to_temp_file(['sed', '/#include/d; /#error/d', header], suffix='.h')
res = self.preprocess_one_header(temp_header, num, ignore_sdkconfig_issue=True)
if res == self.PREPROC_OUT_SAME_HRD_FAILED:
raise HeaderFailedCppGuardMissing()
elif res == self.PREPROC_OUT_DIFFERENT_NO_EXT_C_HDR_FAILED:
raise HeaderFailedCppGuardMissing()
finally:
if temp_header:
os.unlink(temp_header)
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def compile_one_header(self, header: str) -> None:
rc, out, err, cmd = exec_cmd([self.gcc, '-S', '-o-', '-include', header, self.main_c] + self.include_dir_flags)
if rc == 0:
if not re.sub(self.assembly_nocode, '', out, flags=re.M).isspace():
raise HeaderFailedContainsCode()
return # Header OK: produced zero code
self.log('{}: FAILED: compilation issue'.format(header), True)
self.log(err, True)
self.log('\nCompilation command failed:\n{}\n'.format(cmd), True)
raise HeaderFailedBuildError()
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def preprocess_one_header(self, header: str, num: int, ignore_sdkconfig_issue: bool=False) -> int:
all_compilation_flags = ['-w', '-P', '-E', '-DESP_PLATFORM', '-include', header, self.main_c] + self.include_dir_flags
# just strip comments to check for CONFIG_... macros or static asserts
rc, out, err, _ = exec_cmd([self.gcc, '-fpreprocessed', '-dD', '-P', '-E', header] + self.include_dir_flags)
if not ignore_sdkconfig_issue:
if re.search(self.kconfig_macro, out):
# enable defined #error if sdkconfig.h not included
all_compilation_flags.append('-DIDF_CHECK_SDKCONFIG_INCLUDED')
# If the file contain _Static_assert or static_assert, make sure it does't not define ESP_STATIC_ASSERT and that it
# is not an automatically generated soc header file
grp = re.search(self.static_assert, out)
# Normalize the potential A//B, A/./B, A/../A, from the name
normalized_path = os.path.normpath(header)
if grp and not re.search(self.defines_assert, out) and not re.search(self.auto_soc_header, normalized_path):
self.log('{}: FAILED: contains {}. Please use ESP_STATIC_ASSERT'.format(header, grp.group(1)), True)
return self.HEADER_CONTAINS_STATIC_ASSERT
try:
# compile with C++, check for errors, outputs for a temp file
rc, cpp_out, err, cpp_out_file, cmd = exec_cmd_to_temp_file([self.gpp, '--std=c++17'] + all_compilation_flags)
if rc != 0:
if re.search(self.error_macro, err):
if re.search(self.error_orphan_kconfig, err):
self.log('{}: CONFIG_VARS_USED_WHILE_SDKCONFIG_NOT_INCLUDED'.format(header), True)
return self.COMPILE_ERR_REF_CONFIG_HDR_FAILED
self.log('{}: Error directive failure: OK'.format(header))
return self.COMPILE_ERR_ERROR_MACRO_HDR_OK
self.log('{}: FAILED: compilation issue'.format(header), True)
self.log(err, True)
self.log('\nCompilation command failed:\n{}\n'.format(cmd), True)
return self.COMPILE_ERR_HDR_FAILED
# compile with C compiler, outputs to another temp file
rc, _, err, c99_out_file, _ = exec_cmd_to_temp_file([self.gcc, '--std=c99'] + all_compilation_flags)
if rc != 0:
self.log('{} FAILED should never happen'.format(header))
return self.COMPILE_ERR_HDR_FAILED
# diff the two outputs
rc, diff, err, _ = exec_cmd(['diff', c99_out_file, cpp_out_file])
if not diff or diff.isspace():
if not cpp_out or cpp_out.isspace():
self.log('{} The same, but empty out - OK'.format(header))
return self.PREPROC_OUT_ZERO_HDR_OK
self.log('{} FAILED C and C++ preprocessor output is the same!'.format(header), True)
return self.PREPROC_OUT_SAME_HRD_FAILED
if re.search(self.extern_c, diff):
self.log('{} extern C present - OK'.format(header))
return self.PREPROC_OUT_DIFFERENT_WITH_EXT_C_HDR_OK
self.log('{} Different but no extern C - FAILED'.format(header), True)
return self.PREPROC_OUT_DIFFERENT_NO_EXT_C_HDR_FAILED
finally:
os.unlink(cpp_out_file)
try:
os.unlink(c99_out_file)
except Exception:
pass
# Get compilation data from an example to list all public header files
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def list_public_headers(self, ignore_dirs: List, ignore_files: Union[List, Set], only_dir: str=None) -> None:
idf_path = os.getenv('IDF_PATH')
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if idf_path is None:
raise RuntimeError("Environment variable 'IDF_PATH' wasn't set.")
project_dir = os.path.join(idf_path, 'examples', 'get-started', 'blink')
build_dir = tempfile.mkdtemp()
sdkconfig = os.path.join(build_dir, 'sdkconfig')
try:
os.unlink(os.path.join(project_dir, 'sdkconfig'))
except FileNotFoundError:
pass
subprocess.check_call(['idf.py', '-B', build_dir, f'-DSDKCONFIG={sdkconfig}', 'reconfigure'], cwd=project_dir)
build_commands_json = os.path.join(build_dir, 'compile_commands.json')
with open(build_commands_json, 'r', encoding='utf-8') as f:
build_command = json.load(f)[0]['command'].split()
include_dir_flags = []
include_dirs = []
# process compilation flags (includes and defines)
for item in build_command:
if item.startswith('-I'):
include_dir_flags.append(item)
if 'components' in item:
include_dirs.append(item[2:]) # Removing the leading "-I"
if item.startswith('-D'):
include_dir_flags.append(item.replace('\\','')) # removes escaped quotes, eg: -DMBEDTLS_CONFIG_FILE=\\\"mbedtls/esp_config.h\\\"
include_dir_flags.append('-I' + os.path.join(build_dir, 'config'))
include_dir_flags.append('-DCI_HEADER_CHECK')
sdkconfig_h = os.path.join(build_dir, 'config', 'sdkconfig.h')
# prepares a main_c file for easier sdkconfig checks and avoid compilers warning when compiling headers directly
with open(sdkconfig_h, 'a') as f:
f.write('#define IDF_SDKCONFIG_INCLUDED')
main_c = os.path.join(build_dir, 'compile.c')
with open(main_c, 'w') as f:
f.write('#if defined(IDF_CHECK_SDKCONFIG_INCLUDED) && ! defined(IDF_SDKCONFIG_INCLUDED)\n'
'#error CONFIG_VARS_USED_WHILE_SDKCONFIG_NOT_INCLUDED\n'
'#endif')
# processes public include dirs, removing ignored files
all_include_files = []
files_to_check = []
for d in include_dirs:
if only_dir is not None and not os.path.relpath(d, idf_path).startswith(only_dir):
self.log('{} - directory ignored (not in "{}")'.format(d, only_dir))
continue
if os.path.relpath(d, idf_path).startswith(tuple(ignore_dirs)):
self.log('{} - directory ignored'.format(d))
continue
for root, dirnames, filenames in os.walk(d):
for filename in fnmatch.filter(filenames, '*.h'):
all_include_files.append(os.path.join(root, filename))
self.main_c = main_c
self.include_dir_flags = include_dir_flags
ignore_files = set(ignore_files)
# processes public include files, removing ignored files
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for file_name in all_include_files:
rel_path_file = os.path.relpath(file_name, idf_path)
if any([os.path.commonprefix([d, rel_path_file]) == d for d in ignore_dirs]):
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self.log('{} - file ignored (inside ignore dir)'.format(file_name))
continue
if rel_path_file in ignore_files:
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self.log('{} - file ignored'.format(file_name))
continue
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files_to_check.append(file_name)
# removes duplicates and places headers to a work queue
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for file_name in set(files_to_check):
self.job_queue.put(file_name)
self.job_queue.put(None) # to indicate the last job
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def check_all_headers() -> None:
parser = argparse.ArgumentParser('Public header checker file', formatter_class=argparse.RawDescriptionHelpFormatter, epilog='''\
Tips for fixing failures reported by this script
------------------------------------------------
This checker validates all public headers to detect these types of issues:
1) "Sdkconfig Error": Using SDK config macros without including "sdkconfig.h"
* Check if the failing include file or any other included file uses "CONFIG_..." prefixed macros
2) "Header Build Error": Header itself is not compilable (missing includes, macros, types)
* Check that all referenced macros, types are available (defined or included)
* Check that all included header files are available (included in paths)
* Check for possible compilation issues
* Try to compile only the offending header file
3) "Header Missing C++ Guard": Preprocessing the header by C and C++ should produce different output
* Check if the "#ifdef __cplusplus" header sentinels are present
4) "Header Produced non-zero object": Header contains some object, a definition
* Check if no definition is present in the offending header file
5) "Header contains _Static_assert or static_assert": Makes the use of _Static_assert or static_assert
functions instead of using ESP_STATIC_ASSERT macro
Notes:
* The script validates *all* header files (recursively) in public folders for all components.
* The script locates include paths from running a default build of "examples/get-started/blink'
* The script does not support any other targets than esp32
General tips:
* Use "-d" argument to make the script check only the offending header file
* Use "-v" argument to produce more verbose output
* Copy, paste and execute the compilation commands to reproduce build errors (script prints out
the entire compilation command line with absolute paths)
''')
parser.add_argument('--verbose', '-v', help='enables verbose mode', action='store_true')
parser.add_argument('--jobs', '-j', help='number of jobs to run checker', default=1, type=int)
parser.add_argument('--prefix', '-p', help='compiler prefix', default='xtensa-esp32-elf-', type=str)
parser.add_argument('--exclude-file', '-e', help='exception file', default='check_public_headers_exceptions.txt', type=str)
parser.add_argument('--only-dir', '-d', help='reduce the analysis to this directory only', default=None, type=str)
args = parser.parse_args()
# process excluded files and dirs
exclude_file = os.path.join(os.path.dirname(__file__), args.exclude_file)
with open(exclude_file, 'r', encoding='utf-8') as f:
lines = [line.rstrip() for line in f]
ignore_files = []
ignore_dirs = []
for line in lines:
if not line or line.isspace() or line.startswith('#'):
continue
if os.path.isdir(line):
ignore_dirs.append(line)
else:
ignore_files.append(line)
# start header check
with PublicHeaderChecker(args.verbose, args.jobs, args.prefix) as header_check:
header_check.list_public_headers(ignore_dirs, ignore_files, only_dir=args.only_dir)
try:
header_check.join()
failures = header_check.get_failed()
if len(failures) > 0:
for failed in failures:
print(failed)
print(parser.epilog)
exit(1)
print('No errors found')
except KeyboardInterrupt:
print('Keyboard interrupt')
if __name__ == '__main__':
check_all_headers()