lifetime_crash.py

#!/usr/bin/python3
import json
import subprocess
import sys
import os

BUILD_DIR = '../build-wsl'
LIFETIME_CLANG = os.path.join(BUILD_DIR, 'bin', 'clang')


def remove_o_parameter(args):
    a = args.split(" ")
    pos = a.index("-o")
    return " ".join(a[:pos - 1] + a[pos + 2:])


with open(os.path.join(BUILD_DIR, 'compile_commands.json'), 'r') as f:
    objs = json.load(f)

for obj in objs:
    cmd = remove_o_parameter(obj["command"])

    # Replace compiler that was used to build LLVM/clang by the
    # -Wlifetime-enabled compiler that was built
    cmd = cmd.replace('/usr/bin/clang++-7', LIFETIME_CLANG)
    cmd = cmd.replace('/usr/bin/c++', LIFETIME_CLANG)
    cmd_with_lifetime = cmd + " -fsyntax-only -Wlifetime -Wlifetime-debug -Wno-unused-command-line-argument"
    print(cmd_with_lifetime)

    r = subprocess.run(cmd_with_lifetime, shell=True, cwd=obj["directory"])

    if r.returncode != 0:
        print(r.returncode)
        print(cmd)
        subprocess.check_call(cmd + " -E",
                              shell=True,
                              stdout=open('test.cpp', 'w'),
                              cwd=obj["directory"])
        cmd = cmd.replace(obj["file"], 'test.cpp')
        cmd_with_lifetime = cmd_with_lifetime.replace(obj["file"], 'test.cpp')

        with open('cred', 'w') as f:
            f.write("#!/bin/bash\n")
            # f.write("cd " + dir_unix + "\n")
            f.write(cmd + " -fsyntax-only && ! " + cmd_with_lifetime)
        print("Running: creduce ./cred test.cpp")
        subprocess.check_call(["creduce", "./cred", "test.cpp"])
        sys.exit(1)