90 lines
2.8 KiB
Python
90 lines
2.8 KiB
Python
# Example usage:
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# python3 compare_ast.py lib/token.cpp
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# python3 compare_ast.py "--project=compile_commands.json --file-filter=*/lib/somefile.c"
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# check all files in a compile_commands.json:
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# grep '"file":' compile_commands.json | grep -v test | sed 's|.*/curl/|"--project=compile_commands.json --file-filter=*|' | xargs python3 ~/cppcheck/tools/compare_ast.py
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import os
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import re
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import sys
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import subprocess
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CPPCHECK = os.path.expanduser('~/cppcheck/cppcheck')
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def run_cppcheck(cppcheck_parameters:str, clang:str):
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cmd = '{} {} {} --debug --verbose'.format(CPPCHECK, cppcheck_parameters, clang)
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#print(cmd)
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p = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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comm = p.communicate()
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return comm[0].decode('utf-8', 'ignore')
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def get_ast(debug):
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debug = re.sub(r' f:0x[0-9a-fA-F]+', '', debug)
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debug = re.sub(r" '[a-zA-Z0-9: *]+'", '', debug)
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pos1 = debug.rfind('\n##AST\n')
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if pos1 < 0:
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return ''
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pos1 = debug.find('\n', pos1) + 1
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assert pos1 > 0
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pos2 = debug.find("\n##", pos1)
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if pos2 < 0:
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return debug[pos1:]
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return debug[pos1:pos2-1]
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def get_symdb(debug):
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debug = re.sub(r'0x[0-9a-fA-F]+', '0x12345678', debug)
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debug = re.sub(r'nestedIn: Struct', 'nestedIn: Class', debug)
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debug = re.sub(r'classDef: struct', 'classDef: class', debug)
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debug = re.sub(r'isInline: [a-z]+', 'isInline: ---', debug)
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debug = re.sub(r'definedType: .*', 'definedType: ---', debug)
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debug = re.sub(r'needInitialization: .*', 'needInitialization: ---', debug)
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debug = re.sub(r'functionOf: .*', 'functionOf: ---', debug)
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debug = re.sub(r'0x12345678 Struct', '0x12345678 Class', debug)
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pos1 = debug.rfind('\n### Symbol database ###\n')
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if pos1 < 0:
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return ''
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pos1 = debug.find('\n', pos1) + 1
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assert pos1 > 0
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pos2 = debug.find("\n##", pos1)
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if pos2 < 0:
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return debug[pos1:]
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return debug[pos1:pos2-1]
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def compare_ast_symdb(cppcheck_parameters: str):
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same = True
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debug1 = run_cppcheck(cppcheck_parameters, '')
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debug2 = run_cppcheck(cppcheck_parameters, '--clang')
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ast1 = get_ast(debug1)
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ast2 = get_ast(debug2)
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if ast1 != ast2:
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print("ast is not the same: {}".format(cppcheck_parameters))
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with open('cppcheck.ast', 'wt') as f:
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f.write(ast1)
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with open('clang.ast', 'wt') as f:
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f.write(ast2)
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same = False
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symdb1 = get_symdb(debug1)
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symdb2 = get_symdb(debug2)
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if symdb1 != symdb2:
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print("symdb is not the same: {}".format(cppcheck_parameters))
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with open('cppcheck.symdb', 'wt') as f:
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f.write(symdb1)
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with open('clang.symdb', 'wt') as f:
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f.write(symdb2)
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same = False
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if not same:
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sys.exit(1)
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for arg in sys.argv[1:]:
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print(arg)
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compare_ast_symdb(arg)
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