cppcheck/tools/compare_ast.py

60 lines
1.6 KiB
Python

# Example usage:
# python3 compare_ast.py lib/token.cpp
# python3 compare_ast.py "--project=compile_commands.json --file-filter=*/lib/somefile.c"
import glob
import os
import re
import sys
import subprocess
CPPCHECK = os.path.expanduser('~/cppcheck/cppcheck')
def run_cppcheck(cppcheck_parameters:str, clang:str):
cmd = f'{CPPCHECK} {cppcheck_parameters} {clang} --debug --verbose'
print(cmd)
p = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
comm = p.communicate()
return comm[0].decode('utf-8', 'ignore')
def get_ast(debug):
debug = re.sub(r' f:0x[0-9a-fA-F]+', '', debug)
debug = re.sub(r" '[a-zA-Z0-9: *]+'", '', debug)
pos1 = debug.rfind('\n##AST\n')
if pos1 < 0:
return ''
pos1 = debug.find('\n', pos1) + 1
assert pos1 > 0
pos2 = debug.find("\n##", pos1)
if pos2 < 0:
return debug[pos1:]
return debug[pos1:pos2-1]
def compare_ast(cppcheck_parameters: str):
ast1 = get_ast(run_cppcheck(cppcheck_parameters, ''))
ast2 = get_ast(run_cppcheck(cppcheck_parameters, '--clang'))
if ast1 == ast2:
print(f"ast is the same for file {cppcheck_parameters}")
print('ast size:%i' % len(ast1))
else:
print(f"ast is not the same for file {cppcheck_parameters}")
print('saving cppcheck ast in file ast1 and clang ast in file ast2')
f = open('ast1', 'wt')
f.write(ast1)
f.close()
f = open('ast2', 'wt')
f.write(ast2)
f.close()
sys.exit(1)
for arg in sys.argv[1:]:
compare_ast(arg)