101 lines
3.0 KiB
Python
Executable File
101 lines
3.0 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (C) Google LLC, 2020
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#
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# Author: Nathan Huckleberry <nhuck@google.com>
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#
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"""A helper routine run clang-tidy and the clang static-analyzer on
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compile_commands.json.
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"""
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import argparse
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import json
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import multiprocessing
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import subprocess
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import sys
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def parse_arguments():
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"""Set up and parses command-line arguments.
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Returns:
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args: Dict of parsed args
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Has keys: [path, type]
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"""
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usage = """Run clang-tidy or the clang static-analyzer on a
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compilation database."""
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parser = argparse.ArgumentParser(description=usage)
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type_help = "Type of analysis to be performed"
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parser.add_argument("type",
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choices=["clang-tidy", "clang-analyzer"],
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help=type_help)
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path_help = "Path to the compilation database to parse"
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parser.add_argument("path", type=str, help=path_help)
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checks_help = "Checks to pass to the analysis"
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parser.add_argument("-checks", type=str, default=None, help=checks_help)
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header_filter_help = "Pass the -header-filter value to the tool"
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parser.add_argument("-header-filter", type=str, default=None, help=header_filter_help)
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return parser.parse_args()
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def init(l, a):
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global lock
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global args
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lock = l
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args = a
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def run_analysis(entry):
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# Disable all checks, then re-enable the ones we want
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global args
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checks = None
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if args.checks:
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checks = args.checks.split(',')
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else:
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checks = ["-*"]
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if args.type == "clang-tidy":
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checks.append("linuxkernel-*")
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else:
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checks.append("clang-analyzer-*")
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checks.append("-clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling")
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file = entry["file"]
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if not file.endswith(".c") and not file.endswith(".cpp"):
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with lock:
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print(f"Skipping non-C file: '{file}'", file=sys.stderr)
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return
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pargs = ["clang-tidy", "-p", args.path, "-checks=" + ",".join(checks)]
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if args.header_filter:
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pargs.append("-header-filter=" + args.header_filter)
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pargs.append(file)
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p = subprocess.run(pargs,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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cwd=entry["directory"])
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with lock:
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sys.stderr.buffer.write(p.stdout)
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def main():
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try:
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args = parse_arguments()
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lock = multiprocessing.Lock()
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pool = multiprocessing.Pool(initializer=init, initargs=(lock, args))
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# Read JSON data into the datastore variable
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with open(args.path, "r") as f:
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datastore = json.load(f)
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pool.map(run_analysis, datastore)
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except BrokenPipeError:
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# Python flushes standard streams on exit; redirect remaining output
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# to devnull to avoid another BrokenPipeError at shutdown
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devnull = os.open(os.devnull, os.O_WRONLY)
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os.dup2(devnull, sys.stdout.fileno())
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sys.exit(1) # Python exits with error code 1 on EPIPE
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if __name__ == "__main__":
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main()
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